Acarology : Study of ticks and mites.
Actinology : (i) Study of radiation effects (ii) Study of radially symmetrical animals.
Aerobiology : Study of air borne organisms as well as structure (e,g spores) and their distribution.
Agriology : Comparative study of primitive tribal customs
Agrobiology : Quantitative science of plant life and plant nutrition
Agrology : Soil science dealing with production of crops.
Agronomy : Science of soil management of domesticated animals.
Agrostology : Study of grasses.
Andrology : Study of male reproductive organs.
Angiology : Study of blood vascular system, including arteries and veins.
Animal Husbandry : Raising and management of domesticated animals.
Anthology (Bessey) : Study of flowers and flowering plants.
Anthropology : Study of origin development and culture of present and past races of humans.
Aphidology : Study of aphids.
Apiculture : Rearing of bees.
Araneology : Study of spiders.
Arboriculture : Cultivation of trees and shrubs.
Arthrology : Study of joints.
Bacteriology (Ehrenberg) : Study of bacteria.
Bioclimatology : Study of climatic effects on biological processes and organisms.
Biometerology : Study of effects of atmospheric changes on living begins.
Biometrics : (Biometry = Biostatistics). Statistical study of biological problems.
Bionics : Ecology.
Biotechnology : Technology connected with employing living beings or their products in industrial processes.
Brylogy : Study of bryophytes.
Carcinology : (i) Study of crustacea (ii) Study of cancers or tumors.
Cardiology : Study of heart.
Chemotaxonomy : Taxonomy based on chemicals present in organism.
Chirology : Communication system for deaf and mute by sign language.
Chondrology : Study of cartilages.
Chorology : Biogeography.
Cnidology : Study of coelenterates.
Conchology : Study of shells.
Coprology (Scatology) : Study of excrements.
Craniology : Study of skulls.
Cryobiology : It is the study of effects of low temperature on organisms, including their preservation.
Ctetology : Branch of biology connected with acquired characters.
Cytotaxonomy : Classification of organisms based on cellular structure and further, especially on the member of Chromosomes.
Cytology : Study of cell structure is called cytology.
Dactyology : Communication system as for deaf using signs made of fingers.
Dendrochronology : Counting and analyzing annual growth rings of trees.
Dendrology : Study of trees.
Dentistry : Care of teeth including cure, removal, filling and replacement.
Dermatology : Study of skin and other body coverings.
Desmology : Anatomy/study of ligaments.
Dysteleology : Study of appearance of vestigical organs due to evolution (Haeckel’s doctrine of purposelessness
Embryology : It is the study of fertilization and development of a zygote into an embryo, larva or a miniature adult.
Eugenics : Study of factors connected with impairment or improvement of a race.
Euphenics : Treatment of defective heredity through genetic engineering.
Euthenics : Study of environmental conditions that contribute to the improvement of intellect and other traits of human beings.
Exobiology : Study of possibility of life in the outer space.
Ecobiology : (i) Study of adaptations in relation to habitat. (ii) Study of problems connected with existence of life in space and other planets.
Economic Botany/Economic Zoology :Branch dealing with commercially exploited/exploitable plants/ animals.
Ecophysiology :Physiological adaptations in response to environment.
Edaphology/Paedology/Pedology :Soil science.
Endocrinology :Study of endocrine glands, hormones and their effects.
Entomology :Study of insects.
Enzymology : Study of enzymes and their functions.
Epidemiology :Study of distribution, causes and control measures of infectious diseases.
Ethnobotany :Relationships between primitive humans and plants.
Ethnology :Science dealing with different races of mankind.
Ethology :Study of animal behaviour.
Etiology (=Aetiology) :Study of life cycle of pathogen, especially on the host.
Fishery :Catching, breeding, rearing and marketing of fish and other aquatic animals.
Floriculture :Cultivation of plants for their flowers.
Gastroenterology :Study of stomach, intestine and their diseases.
Genecology(Genaeology) :Study of development of individual/race/pedigree.
Geology :Science of earth.
Gerontology :Study of ageing and senescence.
Gnotobiotics :Germ free culture/ life.
Gynaecology :Study of female reproductive organs.
Haematology :Study of blood.
Helminthology :Study of parasitic worms.
Hepatology :Study of liver.
Herpetology :Study of reptiles and amphibians/ creeping animals.
Histochemistry :Chemistry of living tissues.
Horticulture :Development and management of orchards and gardens.
Hypnology :Science dealing with sleep including the one from hypnosis.
Hypnotherapy :Treatment through hypnotism.
Ichthyology :Study of fishes.
Immunology :Study of immunity or resistance to disease.
Kalology :Study of human beauty.
Karyology :Study of cell nucleus and chromosomes.
Karyotaxonomy :Taxonomy based on peculiarities of nucleus chromosome number and type.
Laryngology :Study of larynx.
Lepidopterology :Study of moths and butterflies.
Lichenology :Study of lichens.
Limnology :(i) Study of fresh water ecology (ii) Study of snails.
Malacology :Study of mollusks.
Mammology :Study of mammals.
Mastology :Study of breasts including teats.
Microbial biology : It is the study of structure, life cycle and activities of micro-organisms invisible to naked eye.
Melanology : Study of development and loss of body pigments.
Monerology :Study of monera.
Molecular genetics : Molecular basis of genetics/science of inheritance and variations.
Mycology : Study of fungi.
Myology (Sarcology) : Study of muscles.
Myremecology : Study of ants.
Nematology :Study of round worms (nematodes).
Neonatology :Scientific study of new born.
Neontology : Science of present day or recent living beings.
Nephrology :Study of kidneys.
Neurology :Study of nervous system.
Nidology :Study of nests of birds.
Occupational Therapy : Treating mental and physical defects with occupation.
Olultureeric :Cultivation of vegetables.
Onchology : Study of cancers.
Oology : Study of eggs, particularly those of birds.
Ophiology : Study of ophidia or snakes.
Opthalmology : Study of eyes.
Organocology :Study of organogenesis and embryology.
Ornithology : Study of birds
Osteology : Study of bones
Oto-laryngology : Study of ear and larynx.
Otorhinolaryngology :Study of ENT or ear, nose and throat head and neck disorders.
Pathology : Study of diseases, effects, casual agents, transmission and other activities of pathogens is called pathology.
Paediatrics : Branch of Medicine dealing with children.
Parasitology : Study of parasites
Parazoology : Study of sponges.
Pedology/Paedology : Edaphology Soil Science.
Pharmacy : Compounding and dispensing of drugs.
Photobiology : Effect of light on various biological processes.
Pharmacology : Study of synthesis and effects of medicine an organisms.
Phenology : Recording and study of periodic biotic events like flowering leaf fall, breeding and migration.
Phrenology : Study of mental faculties of brain including feelings.
Phycology (=Algalogy) : Study of algae.
Phylogency : Evolutionary history.
Physiography : Science of physical geography or surface of earth.
Physiotherapy : Treatment of body defects through massage and exercise.
Phytogeny : Evolution and development of plants.
Phytology : Botany, study of plants.
Pomology : Science dealing with fruits and fruit yielding plants.
Poultry Science : Management and rearing of chicken, geese and ducks.
Protistology : Study of protists.
Protozoology : Study of protozoans and related organisms.
Psychiatry : Treatment of mental diseases.
Psychology : Study of human mind and behaviour.
Pteridology : Study of ferns and other pteridophytes.
Radiobiology : Branch of biology dealing with effects of radiation on living beings.
Radiology : Science dealing with X-rays and other imaging techniques for medical diagnosis.
Radiotheraphy : Treatment of diseases with X-rays and radioactive substances.
Rhinology : Study of nose and olfactory organs.
Saurology : Study of lizards.
Sericullture : Rearing silkworms of extraction of silk.
Serology : Study of serum; interaction of antigens and antibodies in the blood.
Serpentology (= Ophiology) : Study of snakes.
Silviculture. (= Sylviculture) : Cultivation of forest trees.
Sitology : Science of food, diet and nutrition
Sonography : Ultrasound imaging.
Sonology : Study of hearing
Spelaeology : Study of caves and cave life..
Syndesmology : Branch of anatomy dealing with ligaments and articulations.
Taxidermatology : Processing of skins and stuffing.
Tectology : Study of structural organization of animals.
Teratology : Study of abnormalities during embryogenesis.
Termitology : Study of termites.
Therapeutics : Treatment of disease.
Torpedology : Study of skates and rays.
Toxicology : Study of harmful effects of drugs and other substances.
Traumatology : Study of wounds.
Tricology : Study of hairs.
Trophology : Science of nutrition.
Urology : Science dealing with disorders of urinary tract(urinogenital tract in males).
Venereology : Study and treatment of venereal diseases.
Virology : Study of viruses.
Xylotomy : Study of anatomy of wood / xylem.
Zoogeny : Origin and development of animals.
Zymology : Study of fermentation processes.