Branch of Science and their Description:

Agrostology: study of grasses
Astronomy: study of stars and planets
Cosmetology: study of cosmetics
Dactylogy: study of fingerprints
Dietetics: nutrition and diet science
Lithology: study of rocks
Orology: study of mountains
Pathology: study of etiologies, mechanisms and manifestation of diseases
Radiology: science of x-rays diagnosis and treatment
Seismology: study of earthquakes phenomena
Theology: study of religions

Branches of Biology (Zoology and Botany):

Biology is science of living organisms, its sub-branches are:

Acarology : Study of mites and ticks.
Actinobiology : Study of radiation effects on organisms.
Aerobiology : Study of flying organisms.
Agriology : Study of customs of primitive man.
Algology : Study of algae.
Anatomy: study of the animal / human body structure by dissection.
Anaesthesiology : Science for causing insensibility.
Aphidology : Study of aphids.
Araneology : Study of spiders.
Arthrology : Study of joints.
Botany: study of plant kingdom
Bryology : Study of mosses and liverworts.
Carcinology : Study of crustaceans.
Chondriology : Study of cartilage.
Chorology : Study of the geographical distribution of organisms.
Cnidology : Study of coelenterates.
Conchology : Study of shells.
Craniology : Study of skulls.
Cryobiology : Study of effects on life at low temperature.
Ctetology : Study of acquired characters of organisms.
Ecobiology : Study of problems of existence of life in the outer space.
Endocrinology: study of glands

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Epidemiology : Study of infection of parasites or epidemic diseases.
Ethnology : Study of mankind.
Ethology : Study of behaviour of animals.
Etiology : Study of cause of disease.
Eugenics : Study of improvement of human race through laws of heredity
Euphenics : Study protein synthesis process in cells.
Euthenics : Science of improvement of modern generation of man through better nutrition.
Exobiology : Study of possible life outside the earth.
Genecology : Study of genetical make up of species or populations in relation to their habitats.
Geology : Study of earth and life as recorded in rocks.
Gerontology : Study of growing old.
Helminthology : Study of parasitic worms.
Herpetology : Study of reptiles.
Hypnology : Study of sleep.
Ichnology : Study of fossil foot prints.
Karyology : Study of nucleus, particularly chromosomes.
Lepidoteriology : Study of moths and butter flies.
Leprology : Study of leprosy.
Limnology : Study of fresh water ecology and study of snails.
Malacology : Study of molluscs.
Mammalogy : Study of mammals.
Melanology : Study of pigments.
Molecular biology : Study of life sciences on molecular level
Mycology : Study of fungi.
Myology : Study of muscles.
Myrmecology : Study of ants and anteaters.
Nematology : Study of nematodes.
Nephology : Study of clouds.
Neontology : Science dealing with the life of recent organisms, just reverse to palaeontology.
Nidology : Study of nests of birds.
Nosology : Study of classification of diseases.
Obstetrics : Science of midwifery.
Odonatology : Study of dragon flies and damsel flies.
Oneirology : Study of dreams.
Ontogeny : Study of life history of organism through development.
Oology : Study of eggs of birds.
Ophiology : Study of snakes.
Organocology : Study of development of organs during embryonic period.
Organology : Study of organs.
Ornithology : Study of birds.
Palaeontology : Study of fossils and their distribution.
Parasitology : Study of parasites.
Parazoology : Study of sponges.
Phenology : Study of periodic phenomena of organisms
Phycology : Study of algae.

Phytopathology : Study of plant diseases
Protistology : Study of protists
Protozoology : Study of unicellular organisms such as protozoans.
Pteridology : Study of ferns.
Rheumatology: study of small joints in human body
Saurology : Study of lizards.
Serology : Study of serum, Study of antigen-antibody reactions.
Serpentology : Study of snakes.
Space biology : Study of existence of life in the outer space.
Speciology : Study of species.
Splanchnology : Study of visceral organs.
Synecology : Study of environmental group of organisms such as communities.
Tactology : Study of structural organization of the body of organisms.
Teleology : Study of interpretations of structures in terms of purpose and utility.
Teratology : Study of monstrals and foetal malformations.
Termitology : Study of termites.
Torpedology : Study of skates and rays.
Toxicology : Study of toxic effects of drugs and harmful compounds.
Zoology: study of animal kingdom
Zoophytology : Study of drifting organisms such as diatoms.
Zootechny : Science of breeding and domesticating animals.
Zymology : Study of fermentation process.

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Branches of Chemistry:

Chemistry is study of elements, their behaviour and laws of their combination

Agrochemistry: Deals with application of Chemistry in agriculture, food processing and environmental remediation.

Physical Chemistry: Physical chemistry gives overall theoretical description of organic, inorganic and analytical chemistry.

Organic Chemistry: It deals with compounds containing carbon. It also helps in petrochemical, pharmaceutical, and textile industries.

Inorganic Chemistry: It deals with non-organic and non carbon containing compounds. Geo-chemistry and bio-organic chemistry are also part of Inorganic chemistry.

Biochemistry: Biochemistry which also known as biological chemistry or physiological chemistry studies chemical composition of living bodies biological molecules like lipids, carbohydrates and proteins etc.

Branches of Medicine:

Angiology : Study of blood vascular system including veins and arteries.
Arthrology : Study of joints.
Carcinology : Study of malignant tissue, tumor and cancer.
Cardiology : Study of heart.
Dermatology : Study of body covering the skin.
Gynaecology : Study of female reproductive organs.
Haematology : Study of blood.
Hepatology : Study of liver.
Hypnology : Study of sleep.
Kalology : Study of human beauty.
Malariology : Study of malaria.
Mastology : Study of breast including teats.
Myology : Study of muscles.
Myrmecology : Study of ants and anteaters.
Neonatology : Study of newborns upto the age of two months.
Nephrology : Study of kidney.
Neurology : Study of nervous system including brain.
Odontology : Study of teeth and gums.
Oncology : Study of tumors.
Ophthalmology : Study of eyes.
Organocology : Study of development of organs during embryonic period.
Organology : Study of organs.
Osteology : Study of bones.
Otolaryngology : Study of ear and larynx.
Otorhinolaryngology : Study of ear, nose and throat (ENT).
Paediatrics : Science of medicine dealing with diseases and disorders of children.
Phrenology : Study of mental faculties of brain including feeling.
Proctology : Study of hindgut including rectum and anus.
Psychiatry : Science of medical treatment of mental diseases.
Rhinology : Study of nose and olfactory organs.
Sarcology : Study of muscles.
Serology : Study of serum, Study of antigen-antibody reactions.

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Sitology : Study of regulation of diet.
Sonology : Study of hearing.
Stomatology : Study of foregut including buccal cavity and stomach.
Syndesmology : Study of bony joints and ligaments.
Taxidermatology : Study of skin and stuffing.
Toxicology : Study of toxic effects of drugs and harmful compounds.
Therapeutics : Science of healing.
Traumatology : Study of wounds.
Tricology : Study of hairs.
Trophology : Study of nutrition.
Urology : Study of urine and its diseases.
Venereology : Study of venereal diseases.
Virology : Study of viruses.

Branches of Physics:

Aeronautics: deals with flight through air
Acoustics: study of sound and its properties
Astronautics: study of travel outside the Earth’s atmosphere
Actinology: chemical effects of electromagnetic radiation
Aerodynamics: study of the motion and control of solid bodies
Austro physics: deals with physical properties of celestial bodies
Audiology: science of hearing

Ballistics: study of motion of projectiles
Cosmology: study of the nature, origin and history of the universe
Crystallography: deals with structure of crystals
Dynamics: behaviour of bodies under the action of forces which change their motion
Electronics: study of circuit involving thermionic values, semi conductors and other electrical components like resistance, capacitors, inductances
Electrostatics: study of the effects associated with electric charge at rest
Fluidics: study of fluid flow through pipes in an analogous way to the flow of electric current through circuits
Electromagnetism: study of forces between electrically charged particles
Holography: Science of recording three dimensional image of an object
Mechanics: deals with behaviour of objects and systems under / in response to various forces.
Kinematics: effect of motion without reference to mass or force
Nuclear physics: deals with study of atomic nucleus and nuclear reactions
Optics: Study of nature and properties of light
Plasma physics: study of highly ionized gases
Quantum physics: study of electromagnetic radiation
Relativistic Physics: studies light and speed of light
Rheology: study of the deformation and flow of matter
Solid state physics: study of physical properties of solid material
Statistical Mechanics: study of the mechanical properties of large assemblies of particles in terms of statistics
Temperature physics: deals with maintenance of temperature