List of Biological and Environmental Disciplines (-ology "study of")

An ology or -logy, is a scientific discipline. The following list focuses on biological and environmental fields of study.

Acarology	the study of ticks and mites
Actinobiology	the study of the effects of radiation upon living organisms
Aerobiology	a branch of biology that studies organic particles that are transported by the air
Aerology	the study of the atmosphere
Aetiology	the medical study of the causation of disease
Agrobiology	the study of plant nutrition and growth in relation to soil
Agrology	the branch of soil science dealing with the production of crops.
Agrostology	the study of grasses
Algology	the study of algae
Allergology	the study of the causes and treatment of allergies
Apiology	the study of bees
Arachnology	the study of spiders
Autecology	the study of the ecology of any individual species
Bacteriology	the study of bacteria
Bioecology	the study of interaction of life in the environment
Biology	the study of life
Bromatology	the study of food
Cetology	the study of cetaceans (e.g., whales, dolphins)
Climatology	the study of the climate
Coleopterology	the study of beetles
Conchology	the study of shells and of mollusks
Coniology	the study of dust in the atmosphere and its effects on living organisms
Cryology	the study of very low temperatures and related phenomena
Cynology	the study of dogs
Dendrochronology	the study of the age of trees and the records in their rings
Dendrology	the study of trees
Dipterology	the study of flies
Ecohydrology	the study of interactions between organisms and the water cycle
Ecology	the study of the relationships between living organisms and their environment
Ecophysiology	the study of the interrelationship between an organism's physical functioning and its environment
Edaphology	a branch of soil science that studies the influence of soil on life
Embryology	the study of embryos
Entomology	the study of insects
Enzymology	the study of enzymes
Epidemiology	the study of the origin and spread of diseases
Ethology	the study of animal behavior
Exobiology	the study of life in outer space
Exogeology	the study of geology of celestial bodies
Felinology	the study of cats
Fetology	the study of the fetus
Geobiology	the study of the biosphere and its relations to the lithosphere and atmosphere
Geochronology	the study of the age of the Earth
Geology	the study of the Earth
Geomorphology	the study of present day landforms
Glaciology	the study of glaciers
Helminthology	the study of parasitic worms
Herbology	the study of the therapeutic use of plants
Herpetology	the study of reptiles and amphibians
Heteroptology	the study of true bugs
Hippology	study of horses
Hydrogeology	the study of underground water
Hydrology	the study of water
Ichnology	the study of fossil footprints, tracks, and burrows
Ichthyology	the study of fish
Kymatology	the study of waves or wave motions
Lepidopterology	the study of butterflies and moths
Limnology	the study of freshwater environments
Lithology	the study of rocks
Malacology	the study of mollusks
Mammalogy	the study of mammals
Meteorology	the study of weather
Microbiology	the study of micro organisms
Micrology	the science of preparing and handling microscopic objects
Mineralogy	the study of minerals
Mycology	the study of fungi
Myrmecology	Sometimes spelled foetology Formicology, the study of ants
Nematology	the study of nematodes
Nephology	the study of clouds
Oceanology	the study of oceans
Odonatology	the study of dragonflies and damselflies
Oology	the study of eggs
Ornithology	the study of birds
Orology	the study of mountains and their mapping
Orthopterology	the study of grasshoppers and crickets
Paleobiology	the study of prehistoric life
Paleobotany	the study of prehistoric metaphytes
Paleoclimatology	the study of prehistoric climates
Paleoecology	the study of prehistoric environments by analyzing fossils and rock strata
Paleontology	the study of fossils of ancient life
Paleophytology	the study of ancient multicellular plants
Paleozoology	the study of prehistoric metazoans
Palynology	the study of pollen
Parasitology	the study of parasites
Petrology	the study of rocks and the conditions by which they form
Phenology	the study of periodic biological phenomena
Phycology	the study of algae
Physiology	the study of the functions of living organisms
Phytology	the study of plants; botany
Phytopathology	the study of plant diseases
Phytosociology	the study of the ecology of plant communities
Planktology	the study of plankton
Pomology	the scientific study of fruits
Primatology	the study of primates
Psychobiology	the study and psychology of organisms with regard to their functions and structures
Seismology	the study of earthquakes
Sociobiology	the study of the effect of evolution on ethology
Speleology	the study or exploration of caves
Synecology	the study of the ecological interrelationships
Thermology	the study of heat
Virology	the study of viruses
Volcanology (or vulcanology)	the study of volcanoes
Xenobiology	the study of non terrestrial life
Xylology	the study of wood
Zoology	the study of animals
Zoopathology	the study of animal diseases
Zoopsychology	the study of mental processes in animals