Acanthochronology – study of cactus spines grown in time ordered sequence.
Acarology – study of mites and ticks.
Aceology – science of remedies, or of therapeutics; iamatology.
Acology – study of medical remedies.
Acoustics – science of sound.
Actinobiology – synonymous with radiobiology.
Adenology – study of glands
Aedoeology – science of generative organs.
Aerobiology – study of airborne organisms.
Aerodonetics – science or study of gliding.
Aerodynamics – dynamics of gases; science of movement in a flow of air or gas.
Aerolithology – study of aerolites; meteorites.
Aeropalynology – study of pollens and spores in atmosphere.
Aerology – study of the atmosphere.
Aeronautics – study of navigation through air or space.
Aerostatics – science of air pressure; art of ballooning.
Agnoiology – study of ignorance.
Agonistics – art and theory of prize-fighting.
Agriology – comparative study of primitive peoples.
Agrobiology – study of plant nutrition; soil yields.
Agroecology – study of ecological processes applied to agricultural production systems.
Agrogeology – study of agrominerals.
Agrology – study of agricultural soils.
Agronomics – study of productivity of land.
Agrostology – science or study of grasses.
Alethiology – study of truth.
Algedonics – science of pleasure and pain.
Algology (botany) – study of algae.
Algology (medicine) – study of pain.
Anaesthesiology – study of anaesthetics.
Anatomy – study of the structure of the body.
Andragogy – theory and practice of education of adults.
Andrology – study of men's physiology.
Anemology – study of wind.
Angiology – study of blood flow and lymphatic system.
Anthropobiology – study of human biology.
Anthropology – study of human cultures.
Anthrozoology – study of human-animal interaction.
Apiology – study of bees.
Aquatic ecology – study of aquatic environment.
Arachnology – study of arachnids.
Archaeology – study of human material remains.
Archelogy – study of first principles.[1]
Archology – science of the origins of government.
Areology – study of Mars.
Aretaics – science of virtue.
Aristology – science or art of dining.
Aromachology – study of smell and odor.
Arthrology – study of joints.
Arthropodology – study of arthropods like insects and arachnids.
Astacology – science of crayfish.
Asteroseismology – study of star oscillations.
Astheniology – study of diseases of weakening and aging.
Astrobotany – study of plants in space.
Astrobiology – study of extraterrestrial life.
Astrodynamics – study of motion of rockets and spacecraft.
Astrogeology – study of extraterrestrial geology.
Astronomy – study of celestial bodies and phenomena.
Astrophysics – study of behaviour of interstellar matter.
Atmology – the science of aqueous vapor.
Audiology – study of hearing.
Autecology – study of ecology of one species.
Autology – scientific study of oneself.
Auxology – science of growth.
Avionics – science of electronic devices for aircraft.
Axiology – science of the ultimate nature of value.
B
Bacteriology – study of bacteria.
Balneology – science of the therapeutic use of baths.
Batrachology – study of frogs.
Barodynamics – science of the support and mechanics of bridges.
Barology – study of gravitational force.
Bathymetry – study of underwater depth of ocean floors or lake floors.
Batology – the study of brambles.
Bibliology – study of books.
Bibliotics – study of documents to determine authenticity.
Bioecology – study of interaction of life in the environment.
Biogeochemistry – study of chemistry of the surface of the Earth.
Biology – study of life.
Biochemistry – study of chemical processes within and relating to living organism.
Biomechanics – study of the structure, function and motion of the mechanical aspects of biological systems.
Biometrics – study of biological measurement for security purposes.
Bionomics – study of organisms interacting in their environments.
Biophysics – study of physics of biological phenomena.
Biopsychology – application of the science of biology to the study of psychology.
Biotribology – study of friction, wear and lubrication of biological systems.
Botany – study of plants.
Bromatology – study of food.
Bryology – study of mosses and liverworts.
C
Cacogenics – study of racial degeneration.
Caliology – study of bird's nests.
Calorifics – study of heat.
Cambistry – science of international exchange.
Campanology – study of bells.
Carcinology – study of crabs and other crustaceans.
Cardiology – study of the heart.
Caricology – study of sedges.
Carpology – study of fruit.
Cartography – science of making maps and globes.
Castrametation – art of designing a camp.
Catacoustics – science of echoes or reflected sounds.
Catallactics – science of commercial exchange.
Catechectics – art of teaching by question and answer.
Celestial mechanics – study of motion of objects in outer space.
Cell biology – study of the different structures and functions of both eukaryote and prokaryote cells.
Cetology – study of whales and dolphins.
Chalcography – art of engraving on copper or brass.
Chalcotriptics – art of taking rubbings from ornamental brasses.
Chaology – study of chaos or chaos theory.
Characterology – study of development of character.
Chemistry – study of properties and behaviours of substances.
Chirocosmetics – beautifying the hands; art of manicure.
Chirography – study of handwriting or penmanship.
Chirology – study of the hands.
Chiropody – medical science of feet.
Chorology – science of the geographic description of anything.
Chrematistics – study of wealth; political economy.
Chromatics – study of color.
Chronobiology – study of biological rhythms.
Chrysology – study of precious metals.
Ciselure – art of chasing metal.
Classical mechanics – study of motion of macroscopic objects.
Climatology – study of climate.
Clinology – study of aging or individual decline after maturity.
Codicology – study of manuscripts.
Coleopterology – study of beetles and weevils.
Cometology – study of comets.
Computer science – study of processes that interact with data.
Conchology – study of shells.
Connectomics – study of connectomes.
Contact mechanics – study of the deformation of solids that touch each other.
Coprology – study of feces.
Cosmetology – study of cosmetics.
Cosmochemistry – study of the chemical composition of matter in the universe and the processes that led to those compositions.
Cosmology – study of the universe.
Craniology – study of the skull.
Criminology – study of crime and criminals.
Cryobiology – study of life under cold conditions.
Cryptology – study of codes.
Cryptozoology – study of animals for whose existence there is no conclusive proof.
Ctetology – study of the inheritance of acquired characteristics.
Cyclonology – study of tropical cyclones, e.g. hurricanes.
Cynology – scientific study of dogs.
Cytology – study of living cells.
D
Dactyliology – study of rings.
Dactylography – study of fingerprints.
Dactylology – study of sign language.
Deltiology – collection and study of picture postcards.
Demography – study of population.
Demology – study of human behaviour.
Dendrochronology – study of tree rings.
Dendrology – study of trees.
Deontology – theory or study of moral obligation.
Dermatoglyphics – study of skin patterns and fingerprints.
Dermatology – study of skin.
Desmology – study of ligaments.
Diabology – study of devils.
Diagraphics – art of making diagrams or drawings.
Dialectology – study of dialects.
Dietetics – study of prevention of health conditions and diseases through human nutrition and regulation of diet.
Dioptrics – study of light refraction.
Diplomatics – science of deciphering ancient writings and texts.
Diplomatology – study of diplomats.
Docimology – art of assaying.
Dosiology – study of doses.
Dynamics – study of forces and their effects on motion.
Dysgenics – study of racial degeneration.
E
Ecclesiology – study of church affairs.
Eccrinology – study of excretion.
Ecology – study of environment.
Economics – study of material wealth (production, distribution, and consumption of goods and services).
Edaphology – study of soils.
Egyptology – study of ancient Egypt.
Eidology – study of mental imagery.[2]
Ekistics – study of human settlement.
Electrochemistry – study of relations between electricity and chemicals.
Electrodynamics – study of the effects arising from the interactions of electric currents with magnets, with other currents, or with themselves.
Electrology – study of electricity.
Electrostatics – study of static electricity.
Electromagnetism – study of electromagnetic force.
Embryology – study of embryos
Emetology – study of vomiting.
Emmenology – study of menstruation.
Endemiology – study of local diseases.
Endocrinology – study of glands.
Energetics – study of energy under transformation within various fields.
Engineering studies – study of engineering.
Enigmatology – study of enigmas (puzzles).
Entomology – study of insects.
Entozoology – study of parasites that live inside larger organisms.
Enzymology – study of enzymes.
Ephebiatrics – branch of medicine dealing with adolescence.
Epidemiology – study of diseases and epidemics.
Epileptology – study of epilepsy.
Epistemology – study of grounds of knowledge.
Eremology – study of deserts.
Ergology – study of effects of work on humans.
Ergonomics – study of people at work.
Escapology – study of freeing oneself from constraints.
Eschatology – study of death; final matters.
Ethnobiology – study of dynamic relationships between peoples.
Ethnobotany – study of a region's plants and their practical uses through the traditional knowledge of a local culture and people.
Ethnogeny – study of origins of races or ethnic groups.
Ethnochoreology – study of dances and its implication in culture.
Ethnomusicology – study of comparative musical systems.
Ethnology – study of cultures.
Ethnomethodology – study of everyday communication and social interaction.
Ethology – study of natural or biological character.
Ethonomics – study of economic and ethical principles of a society.
Etiology – science of causes, especially of disease.
Etymology – study of origins of words.
Euthenics – science concerned with improving living conditions.
Exobiology – study of extraterrestrial life.
Exoplanetology – study of exoplanets.
F
Felinology – study of felines.
Finance – science or study of money management.
Floristry – art of cultivating and selling flowers.
Fluid dynamics – study of flow of fluids.
Fluid mechanics – study of fluids behaviour at rest and in motion.
Fluid statics – study of fluids behaviour at rest.
Fluviology – study of watercourses.
Folkloristics – study of folklore and fables.
Forestry – study of the creation, management, use, conservation, and repair of forests and associated resources.
Fracture mechanics – study of the propagation of cracks in materials.
Futurology – study of future.
G
Garbology – study of garbage
Gastroenterology – study of the digestive system
Gastronomy – study of fine dining
Gemmology – study of gems and jewels
Gender Studies – study of gender
Genealogy – study of descent of families
Genesiology – study of reproduction and heredity
Genetics – study of genes
Geochemistry – study of chemistry of the earth's crust
Geochronology – study of measuring geological time
Geography – study of surface of the earth and its inhabitants
Geology – study of the rocks of a planet
Geometry – study the sizes, shapes, positions angles and dimensions of things.
Geomorphogeny – study of the characteristics, origins, and development of land forms
Geomorphology – study of landforms and landform evolution
Geoponics – study of agriculture
Geotechnics – study of increasing habitability of the earth
Geratology – study of decadence and decay
Gerocomy – study of old age
Gerontology – study of the elderly and aging
Gigantology – study of giants
Glaciology – study of ice ages and glaciation
Glossology – study of language; study of the tongue
Glyptography – art of engraving on gems
Glyptology – study of gem engravings
Gnomonics – the art of measuring time using sundials
Gnosiology – study of knowledge; philosophy of knowledge
Gnotobiology – study of life in germ-free conditions
Graminology – study of grasses
Grammatology – study of systems of writing
Graphemics – study of systems of representing speech in writing
Graphology – study of handwriting
Gromatics – science of surveying
Gynaecology – study of women's physiology
Gyrostatics – study of rotating bodies
H
Haemataulics – study of movement of blood through blood vessels
Hagiology – study of saints
Halieutics – study of fishing
Hamartiology – study of sin
Harmonics – study of musical acoustics
Hedonics – part of ethics or psychology dealing with pleasure
Helcology – study of ulcers
Heliology – science of the sun
Helioseismology – study of sun's interior by observing its surface oscillations
Helminthology – study of worms
Hematology – study of blood
Hemodynamics – study of the dynamics behind blood circulation
Hepatology – study of liver, gallbladder, biliary tree, and pancreas
Heredity – study of passing of traits from parents to offspring
Heresiology – study of heresies
Hermeology – study of Mercury
Herpetology – study of reptiles and amphibians
Hierology – science of sacred matters
Hippiatrics – study of diseases of horses
Hippology – study of horses
Histology – study of the tissues of organisms
Histopathology – study of changes in tissue due to disease
Historiography – study of writing history
Historiology – study of history
Homiletics – art of preaching
Home Economics – deals with home and economics
Hoplology – study of human combative behavior and performance
Horography – art of constructing sundials or clocks
Horology – science of time measurement
Horticulture – study of gardening
Hydrobiology – study of aquatic organisms
Hydrodynamics – study of movement in liquids
Hydrogeology – study of ground water
Hydrography – study of investigating bodies of water
Hydrokinetics – study of motion of fluids
Hydrology – study of water resources
Hydrometeorology – study of atmospheric moisture
Hydropathy – study of treating diseases with water
Hydrostatics – study of fluids behaviour at rest
Hyetology – science of rainfall
Hygiastics – science of health and hygiene
Hygienics – study of sanitation; health
Hygiology – hygienics; study of cleanliness
Hygroscopy – study of humidity
Hygrometry – science of humidity
Hymnography – study of writing hymns
Hymnology – study of hymns
Hypnology – study of sleep; study of hypnosis
Hypsography – science of measuring heights
I
Iamatology – study of remedies
Iatrology – treatise or text on medical topics; study of medicine
Iatromathematics – archaic practice of medicine in conjunction with astrology
Ichnography – art of drawing ground plans; a ground plan
Ichnology – science of fossilized footprints
Ichthyology – study of fish
Iconography – study of drawing symbols
Iconology – study of icons; symbols
Ideogeny – study of origins of ideas
Ideology – science of ideas; system of ideas used to justify behaviour
Idiomology – study of idiom, jargon or dialect
Idiopsychology – study of the psychology of one's own mind
Immunochemistry – study of chemistry of the immune system
Immunogenetics – study of genetic characteristics of immunity
Immunology – study of immunity
Immunopathology – study of immunity to disease
Insectology – study of insects
Irenology – study of peace
Iridology – study of the iris; diagnosis of disease based on the iris of the eye
K
Kalology – study of beauty
Karyology – study of cell nuclei
Kinematics – study of motion
Kinesics – study of gestural communication
Kinesiology – study of human movement and posture
Kinetics – study of forces producing or changing motion
Koniology – study of atmospheric pollutants and dust
Ktenology – science of putting people to death
Kymatology – study of wave motion
L
Labeorphily – collection and study of beer bottle labels
Larithmics – study of population statistics
Laryngology – study of larynx
Lepidopterology – study of butterflies and moths
Leprology – study of leprosy
Lexicology – study of words and their meanings
Lexigraphy – art of definition of words
Lichenology – study of lichens
Library and information science – study of organization, access, collection, and protection/regulation of information, whether in physical or digital forms.
Limacology – study of slugs
Limnobiology – study of freshwater ecosystems
Limnology – study of bodies of fresh water
Linguistics – study of language
Liturgiology – study of liturgical forms and church rituals
Loimology – study of plagues and epidemics
Loxodromy – study of sailing along rhumb-lines
Ludology – study of games
M
Macroeconomics – branch of economics dealing with the performance, structure, behavior, and decision-making of the whole economy
Magirics – art of cookery
Magnanerie – art of raising silkworms
Magnetics – study of magnetism
Magnetohydrodynamics – study of electrically conducting fluids
Magnetostatics – study of magnetic fields in systems where the currents are steady
Malacology – study of molluscs
Malariology – study of malaria
Mammalogy – study of mammals
Manège – art of horsemanship
Mariology – study of the Virgin Mary
Marine biology – study of the ocean's ecosystem
Mastology – study of mammals
Mathematics – study of magnitude, number, and forms
Mazology – mammalogy; study of mammals
Mechanics – study of action of force on bodies
Meconology – study of or treatise concerning opium
Media studies – study of mass media
Medicine – science of diagnosis, prognosis, treatment, and prevention of disease
Melissopalynology – study of honey
Melittology – study of bees
Melology – study of music; musicology
Mereology – study of part-whole relationships
Mesology – ecology
Metallogeny – study of the origin and distribution of metal deposits
Metallography – study of the structure and constitution of metals
Metallurgy – study of alloying and treating metals
Metaphysics – study of principles of nature and thought
Metapolitics – study of politics in theory or abstract
Metapsychology – study of nature of the mind
Metascience – study of science
Meteoritics – study of meteors
Meteorology – study of weather
Methodology – the study or description of methods
Methyology – study of alcohol
Metrics – study of versification
Metrology – science of weights and measures
Microanatomy – study of microscopic tissues
Microbial ecology – study of microbial environment
Microbiology – study of microscopic organisms
Microclimatology – study of local climates
Microeconomics – branch of economics that studies the behavior of individual households and firms in making decisions on the allocation of limited resources
Micrology – study or discussion of trivialities
Micropalaeontology – study of microscopic fossils
Microphytology – study of very small plant life
Microscopy – study of minute objects
Mineralogy – study of minerals
Molecular biology – study of the molecular basis of biological activity in and between cells
Molinology – study of mills and milling
Momilogy – study of mummies
Morphology – study of forms and the development of structures
Muscology – study of mosses
Museology – study of museums
Musicology – study of music
Mycology – study of funguses
Myology – study of muscles
Myrmecology – study of ants
Mythology – study of myths; fables; tales
N
Naology – study of church or temple architecture
Nasology – study of the nose
Nautics – art of navigation
Necroplanetology – study of the destruction of planets[3]
Nematology – study of nematodes
Neonatology – study of newborn babies
Neossology – study of nestling birds
Nephology – study of clouds
Nephrology – study of the kidneys
Neurobiology – study of anatomy of the nervous system
Neuroeconomics – study of human decision making and the ability to process multiple alternatives and to choose an optimal course of action
Neurology – study of nervous system
Neuropsychology – study of relation between brain and behaviour
Neurypnology – study of hypnotism
Neutrosophy – study of the origin and nature of philosophical neutralities
Nomology – the science of the laws; especially of the mind
Noology – science of the intellect
Nosology – study of diseases
Nostology – study of senility
Notaphily – study and collecting of bank-notes and cheques
Numerology – pseudoscientific study of numbers
Numismatics – study of coins
Nymphology – study of nymphs
Nanotechnology – study of nanite
O
Obstetrics – study of midwifery
Oceanography – study of oceans
Oceanology – study of oceans
Odontology – study of teeth
Odonatology– study of dragonflies and damselflies
Oenology – study of wines
Oikology – science of housekeeping
Olfactology – study of the sense of smell
Ombrology – study of rain
Oncology – study of tumours
Oneirology – study of dreams
Onomasiology – study of nomenclature
Onomastics – study of proper names
Ontology – science of pure being; the nature of things
Oology – study of eggs
Ophiology – study of snakes
Ophthalmology – study of eye diseases
Optics – study of light
Optology – study of sight
Optometry – science of examining the eyes
Orchidology – study of orchids
Ornithology – study of birds
Organology (biology) – study of form, structure, development, and functions of plant or animal organs
Organology (musicology) – study of musical instruments in relation to history, culture, construction, acoustic properties and classification
Orology – study of mountains
Orthoepy – study of correct pronunciation
Orthography – study of spelling
Orthopterology – study of cockroaches
Oryctology – mineralogy or paleontology
Osmics – scientific study of smells
Osmology – study of smells and olfactory processes
Osphresiology – study of the sense of smell
Osteology – study of bones
Otology – study of the ear
Otorhinolaryngology – study of ear, nose and throat
P
Paedology – study of children
Paidonosology – study of children's diseases; pediatrics
Palaeoanthropology – study of early humans
Palaeobiology – study of fossil plants and animals
Palaeoclimatology – study of ancient climates
Palaeoichthyology – study of ancient fish
Palaeolimnology – study of ancient lakes
Palaeontology – study of fossils
Palaeopedology – study of early soils
Paleobotany – study of ancient plants
Paleo-osteology – study of ancient bones
Palynology – study of pollen
Papyrology – study of paper
Paradoxology – study of paradoxes
Parapsychology – study of unexplained mental phenomena
Parasitology – study of parasites
Paroemiology – study of proverbs
Parthenology – study of virgins
Pataphysics – science of imaginary solutions
Pathology – study of disease
Patrology – study of early Christianity
Pedagogics – study of teaching
Pedology – study of soils
Pelology – study of mud
Penology – study of crime and punishment
Periodontics – study of gums
Peristerophily – pigeon-collecting
Pestology – science of pests
Petrology – study of rocks
Pharmacognosy – study of drugs of animal and plant origin
Pharmacology – study of drugs
Pharology – study of lighthouses
Pharyngology – study of the throat
Phenology – study of organisms as affected by climate
Phenomenology – study of phenomena
Philematology – act or study of kissing
Phillumeny – collecting of matchbox labels
Philology – study of ancient texts; historical linguistics
Philosophy – science of knowledge or wisdom
Phoniatrics – study and correction of speech defects
Phonology – study of speech sounds
Photobiology – study of effects of light on organisms
Photonics – study of photons
Phraseology – study of phrases
Phrenology – study of bumps on the head
Phycology – study of algae and seaweeds
Physics – study of properties of matter, force and energy
Physiology – study of processes of life
Phytology – study of plants; botany
Piscatology – study of fishes
Pisteology – science or study of faith
Planetology – study of planets
Plumology – study of feathers
Plutology – political economy; study of wealth
Pneumatics – study of mechanics of gases
Pneumonology – study of diseases involving the respiratory tract
Podiatry – study and treatment of disorders of the foot; chiropody
Podology – study of the feet
Polemology – study of war
Pomology – study of fruit-growing
Pogonology – study of beards
Posology – science of quantity or dosage
Potamology – study of rivers
Praxeology – study of practical or efficient activity; science of efficient action
Primatology – study of primates
Proctology – study of rectum, anus, and colon
Prosody – study of versification
Protistology – study of protists
Proxemics – study of man's need for personal space
Psalligraphy – art of paper-cutting to make pictures
Psephology – study of election results and voting trends
Pseudology – art or science of lying
Pseudoptics – study of optical illusions
Psychobiology – study of biology of the mind
Psychogenetics – study of internal or mental states
Psychognosy – study of mentality, personality or character
Psychology – study of mind
Psychopathology – study of mental illness
Psychophysics – study of link between mental and physical processes
Pteridology – study of ferns
Pterylology – study of distribution of feathers on birds
Punnology – study of puns[4]
Pyretology – study of fevers
Pyrgology – study of towers
Pyroballogy – study of artillery
Pyrography – study of woodburning
Pyrotechnics – study of combustion through fire or explosions
Q
Quinology – study of quinine.
Quantum computing – the exploitation of collective properties of quantum states, such as superposition and entanglement, to perform computation.
Quantum mechanics – a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles
Queer theory – study of issues related to sexual orientation and gender identity
R
Raciology – study of racial differences
Radiobiology – study of the scientific principles, mechanisms, and effects of the interaction of ionizing radiation with living matter
Radiochemistry – study of ordinary chemical reactions under radioactive circumstances
Radiology – study of X-rays and their medical applications
Reflexology – study of reflexes
Rheology – science of the deformation or flow of matter
Rheumatology – study of rheumatism
Rhinology – study of the nose
Rhochrematics – science of inventory management and the movement of products
Robotics – deals with the designing, construction, and operation of robots
Runology – study of runes
S
Sarcology – study of fleshy parts of the body
Satanology – study of the devil
Scatology – study of excrement or obscene literature
Schematonics – art of using gesture to express tones
Sciagraphy – art of shading
Scripophily – collection of bond and share certificates
Sedimentology – study of sediment
Seismology – study of earthquakes
Selenodesy – study of the shape and features of the moon
Selenology – study of the moon
Semantics – study of meaning
Semantology – science of meanings of words
Semasiology – study of meaning; semantics
Semiology – study of signs and signals
Semiotics – study of signs and symbols
Serology – study of serums
Sexology – study of sexual behaviour
Siderology – study of iron and its alloys, including steel
Significs – science of meaning
Silvics – study of tree's life
Sindonology – study of the shroud of Turin
Sinology – study of China
Sitology – dietetics
Sociobiology – study of biological basis of human behaviour
Sociology – study of society
Solid mechanics – study of behaviour of solid materials
Somatology – science of substances
Sophiology – science of ideas
Soteriology – study of theological salvation
Snow hydrology – study of snow
Spectrology – study of ghosts
Spectroscopy – study of spectra
Speleology – study and exploration of caves
Spermology – study of seeds
Sphagnology – study of peat moss
Sphygmology – study of the pulse
Splanchnology – study of the entrails or viscera
Spongology – study of sponges
Stasiology – study of political parties
Statics – study of bodies and forces in equilibrium
Stellar astronomy – study of stars, their origins, and their evolution.
Stemmatology – study of relationships between text
Stereochemistry – study of chemistry of the relative spatial arrangement of atoms that form the structure of molecules and their manipulation.
Stoichiology – science of elements of animal tissues
Stomatology – study of the mouth
Storiology – study of folk tales
Stratigraphy – study of geological layers or strata
Stratography – art of leading an army
Stylometry – studying literature by means of statistical analysis
Suicidology – study of suicide
Supramolecular chemistry – study of the chemistry of assembled molecular sub-units
Symbology – study of symbols
Symptomatology – study of symptoms of illness
Synecology – study of ecological communities
Synectics – study of processes of invention
Syntax – study of sentence structure
Syphilology – study of syphilis
Systematics – study of the diversification of living forms, both past and present
Systems science – study of systems
T
Taxidermy – art of curing and stuffing animals
Taxonomy – study of plant, animals and microorganisms classification
Tectonics – science of structure of objects, buildings and landforms
Tegestology – study and collecting of beer mats
Teleology – study of final causes; analysis in terms of purpose
Telmatology – study of swamps
Tempestology – study of tropical cyclones, e.g. hurricanes
Teratology – study of birth defects and later abnormalities in living organisms
Terrestrial ecology – study of terrestrial environment
Teuthology – study of cephalopods
Textology – study of the production of texts
Thalassography – science of the sea
Thanatology – study of death and its customs
Thaumatology – study of miracles
Theoretical computer science – science combining computer science and mathematics
Theriogenology – study of animals' reproductive systems
Thermodynamics – study of relation of heat to motion
Thermokinematics – study of motion of heat
Thermology – study of heat
Therology – study of wild mammals
Thremmatology – science of breeding domestic animals and plants
Threpsology – science of nutrition
Tidology – study of tides
Timbrology – study of postage stamps
Tocology – obstetrics; midwifery
Tokology – study of childbirth
Tonetics – study of pronunciation
Topography – study of the shape and features of land surfaces
Topology – study of places and their natural features
Toponymics – study of place-names
Toreutics – study of artistic work in metal
Toxicology – study of poisons
Toxophily – love of archery; archery; study of archery
Traumatology – study of wounds and their effects
Tribology – study of friction and wear between surfaces
Trichology – study of hair and its disorders
Trophology – study of nutrition
Tsiganology – study of gypsies
Turbology – study of tornadoes
Turnery – art of turning in a lathe
Typhlology – study of blindness and the blind
Typography – art of printing or using type
Typology – study of types of things
U
Uranography – descriptive astronomy and mapping
Uranology – study of the heavens; astronomy
Urbanology – study of cities
Urenology – study of rust molds
Urology – study of urine and the urinary tract
V
Venereology – study of venereal disease
Veterinary medicine – study of medicine in domesticated animals
Vexillology – study of flags
Victimology – study of victims
Vinology – scientific study of vines and winemaking
Virology – study of viruses
Vitrics – study of glassy materials; glassware
Volcanology – study of volcanoes
X
Xenobiology – study of biological systems which do not exist in nature
Xylography – art of engraving on wood
Xylology – study of wood
Z
Zenography – study of the planet Jupiter
Zooarchaeology – study of animal remains of archaeological sites
Zoochemistry – study of chemistry of animals
Zoogeography – study of geographic distribution of animals
Zoogeology – study of fossil animal remains
Zoology – study of animals
Zoonomy – animal physiology
Zoonosology – study of animal diseases
Zoopathology – study of animal diseases
Zoophysics – physics of animal bodies
Zoophysiology – study of physiology of animals
Zoophytology – study of plant-like animals
Zoosemiotics – study of animal communication
Zootaxy – science of classifying animals
Zootechnics – science of breeding animals
Zygology – science of joining and fastening
Zymology – science of fermentation
Zymurgy – branch of chemistry dealing with brewing and distilling
Zythology – study of beer
