ScienceOrganized form of Knowledge or systematic knowledge i.e. knowledge through process.
2BiologyThe branch of science that deals with the study of living beings.
3ZoologyZoology is the study of animal kingdom which includes the anatomy, physiology, evolution, characteristic, and classification of all living and extinct animals. From Zoology branch further specialties.
4MorphologyThe branch of science that deals with the study of total general structures and forms including shape, size and appearance.
5AnatomyThe branch of science that deals with the study of internal structures after cutting or dissection.
6HistologyThe branch of science that deals with the study of tissue i.e. microscopic anatomy.
7CytologyThe branch of science that deals with the study of cells and their organelles.
8AcarologyStudy of tics and mites.
9ActinobiologyThe branch of science that deals with the study of radiation effects on organism.
10AerobiologyStudy of Flying organisms.
11AgroforestryThis branch deals with form of land used on which herbaceous crops and trees crops are cultivated.
12AgronomyAgronomy is a branch of agricultural science that deals with the study of crops and the soils in which they grow. 
13AgrostologyThe branch of botany relating to grasses (Poaceae).
14AngiologyThe study of blood vascular system.
15AnthropologyAnthropology is the study of people throughout the world, their evolutionary history, how they behave, adapt to different environments, communicate and socialise.
16ApicultureBeekeeping (or apiculture) is the maintenance of bee colonies, commonly in man-made hives, by humans. Most such bees are honey bees in the genus Apis, but other honey-producing bees such as Melipona stingless bees are also kept.
17AraneologyArachnology is the scientific study of spiders and related animals such as scorpions, pseudoscorpions, and harvestmen, collectively called arachnids.
18ArthrologyArthrology is the science concerned with the study of anatomy, function, dysfunction and treatment of joints and articulations.

Study of round worms 

20BacteriologyStudy of bacteria. Bacteria are single-celled microorganisms that lack a nuclear membrane, metabolically active and divide by binary fission. Medically they are a major cause of disease. Superficially, bacteria appear to be relatively simple forms of life; in fact, they are sophisticated and highly adaptable. 
21BatrachologyStudy of frogs.
22BiochemistryBranch of science which deals with the study of chemical reactions in relations to life activities.
23BiometricsStatistical analysis of different results of biological experiments.
24BiotechnologyUse of biological organisms in commercial processes for producing fine chemicals such as drugs, vaccines and harmones etc.  on a large scale and at reasonable cost.
25BotanyBotany, also called plant science(s), plant biology or phytology, is the science of plant life and a branch of biology.
26BryologyBryology (from Greek bryon, a moss, a liverwort) is the branch of botany concerned with the scientific study of bryophytes (mosses, liverworts, and hornworts)
27CarcinologyStudy of crabs and crustaceans
28CardiologyCardiology is the study and treatment of disorders of the heart and the blood vessels.
29ChondrologyStudy of Cartilage. Articular cartilage is the highly specialized connective tissue of diarthrodial joints.
30ChromatographyStudy of Pigments.
31CnidologyStudy of Coelenterata. Coelenterata is an obsolete term including the creature phyla Cnidaria and Ctenophora. They have to an extraordinary degree crucial tissue relationship, with just two layers of cells, and expanded symmetry. 
32ConchologyStudy of shells. Conchology is one phase of MALACOLOGY (The branch of Zoology that deals with the study of the Mollusca Phylum).
33CraniologyStudy of skulls
34CryobiologyStudy of effects on life at very lower temperature.
35DendrologyStudy of shrubs and trees
36DermatologyStudy of skin
37EcobiologyStudy of problems of existence of life in outer space
38EcologyStudy of relationship between organism and environment
39EmbryologyStudy of embryo i.e. developmental stages after fertilization or birth of young ones.
40EndocrinologyStudy of endocrine glands and their secretions
41EntomologyStudy of insects
42EnzymologyStudy of enzymes
43EthnologyStudy of man-kinds
44EthologyStudy of conditions of animals or behavior of animals, in a natural contest
45EtiologyStudy of diseases
46EugenicsStudy of improvement of human race by applying laws of heredity. It applied before birth. Eugenics is related with future generation.
47EuphenicsStudy of improvement of human race by drug treatment or gene engineering i.e. medical engineering of genetic disorder.
48EuthenicsStudy of improvement of human race by improving environment. It applied after birth and is related with present generation.
49EvolutionThe branch of science which deals with the study of origin of new from old i.e. origin, variation, inter-relationship between organisms of past and present days.
50ExobiologySpace biology is also known as exobiology
51FloricultureStudy of flower yielding plants
52GeneticsStudy of heredity and variations
53GerontologyStudy of growing old
54GynaecologyStudy of female reproductive organs
55HaematologyStudy of blood
56HelminthologyStudy of helminthes
57HepatologyStudy of liver
58HerpetologyStudy of lizards and other reptiles
59HypnologyStudy which deals with sleep
60HistochemistryStudy of chemical nature of tissues
61HorticultureStudy of flowering and fruits plants
62IchnologyStudy of fossil footprints
63ImmunologyStudy of resistance of organisms against infection
64KalologyStudy of sensory or sensari-emotional values, sometimes called judgments of sentiment and taste
65KaryologyStudy of nucleus
66LepidopterologyStudy of moths and butterflies
67LichenologyStudy of lichens
68LimnologyStudy of fresh water lakes, ponds and streams in relation with plants and animals
69MalacologyStudy of mollusks
70MammologyStudy of mammals
71MastologyStudy of breasts
72MelanologyStudy of pigments
73Molecular BiologyStudy of life sciences on molecular level (i.e. RNA and DNA level)
74MycologyStudy of fungi
75MyrmecologyStudy of ants
76NeonatologyStudy of the new-born up to 1 month of age
77NephrologyStudy of kidney
78NeurologyStudy of nervous system
79NidologyStudy of nests of birds
80NisologyStudy of diseases
81OdontologyStudy of teeth and gums
82OlericultureStudy of vegetable yielding plants
83OncologyStudy of cancer
84OneirologyStudy of dreams
85OntogenyStudy of embryonic history
86OologyStudy of egg of birds
87OphthalmologyStudy of eyes
88OrganocologyStudy of development of organs under embryology
89OrganologyStudy of organs
90OrnithologyStudy of birds
91OsteologyStudy of bones
92OtorhinolaryngologyStudy of ear, nose and throat
93PaedologyStudy of larval stages
94PalaezoologyStudy of fossils and their distribution in time.
95PalaeozoologyStudy of fossils of animals
96PalynologyStudy of pollen grains in relation to taxonomy and evolution
97ParasitologyStudy of parasites
98PathologyStudy of various diseases in human beings
99ParazoologyStudy of poifera (sponges)
100PedologyStudy of soils
101PharmacognosyBranch of science dealing with the medicinal plants
102PharmacologyStudy of synthesis and effect of medicines on organisms
103PhenologyStudy of organisms as affected by seasonal climates e.g. of bird migration, opening of flowers etc.
104PhrenologyStudy of mental faculties of brain including feelings
105Phycology (algology)Study of algae
106PhylogenyStudy of evolutionary history
107PhysiologyStudy of functions of various parts within the organisms
108PiscicultureStudy of rearing of fishes
109PlatyhelminthologyStudy of flat worms
110PomologyStudy of fruits
111PoultryStudy which deals with keepings of foul
112ProctologyStudy of hind gut including rectum and anus
113ProtistologyStudy of protests. Its field of study overlaps with more traditional disciplines of algology, mycology and protozoology
114PteridologyStudy of pteridophytes
115RainologyStudy of nose and olfactory organs
116SaurologyStudy of lizards
117SericultureSilk industry concerned with culture of silk moth and pupa
118SerologyStudy of serum; interaction of antigens and antibodies in the blood
119Sepentology (Ophiology)Study of snakes
120SilvicultureStudy of development of forests
121SitologyStudy of dietetics
122SpeciologyStudy of species
123SpermologyStudy of seeds
124SplanchnologyStudy of visceral organs
125StomatologyStudy of forget including buccal cavity and stomach
126SynecologyStudy of bony joints and ligaments
127Taxi dermatologyStudy of skin and stuffing
128TaxonomyThe breach of science which deals with the study of classification of organisms
129TeratologyStudy of foetal malformations
130TorpedologyStudy of skates and rays
131ToxicologyStudy of narcotics and the influence of narcotics on various organisms
132TraumatologyStudy of wounds and turnover
133TrichologyStudy of hair
134TrophologyStudy of nutrition
135UrobiologyStudy which deals with preservation of deals bodies in liquids by chemicals
136UrologyStudy of wine including diseases and the abnormalities of uninary and urino-genital tract
137VirologyStudy of virus
138ZoogeographyThe branch of science which deals with the study of distribution of animals on earth.
139BiophysicsStudy of physical aspects of living organisms
140CytogeneticsStudy of cytological basis of inheritance
141CtetologyStudy of acquired characteristics of organisms
142IchthyologyStudy of fish and it’s culture
143KinesiologyStudy of muscle movements
144PhytogeographyStudy of plants distribution on earth
145PalaeobotanyStudy of distribution and characteristics of fossils
146PsychobiologyStudy of behavioural aspects of animals
147SarcologyStudy of muscles
148SyndesmologyStudy of bone joints and ligaments
149TectologyStudy of structural organization of body

Study of drifting micro-organisms such as diatoms.