| Term | Definition |
| Anthropology | science dealing with the origin, races, customs and beliefs of mankind |
| Bacteriology | science dealing with the study of bacteria |
| Biology | science dealing with the study of living organisms |
| Cardiology | science dealing with the heart |
| Criminology | scientific study of criminals and crimes |
| Dermatology | scientific study of the skin and it's diseases |
| Ecology | scientific dealing with the relation of living things to their environment and to each other |
| Ethnology | branch of anthropology dealing with human races, their origin, distribution, culture, etc. |
| Genealogy | account of the descent of a person or family from an ancestor |
| Geology | science dealing with the earth's history as recorded in rocks |
| Meteorology | science dealing with the weather |
| Morphology | scientific study of the forms and structures of plants and animals |
| Mythology | account or study of myths |
| Necrology | list of persons who have died recently |
| Neurology | scientific study of the nervous system and its diseases. |
| Paleontology | science dealing with life in the remote past as recorded in fossils |
| Pathology | science dealing with the nature and causes of disease |
| Petrology | scientific study of rocks |
| Physiology | science dealing with the functions of living things or their organs |
| Psychology | science of the mind |
| Sociology | study of the evolution, development, and functioning of the human society |
| Technology | use of science to achieve a practical purpose applied science |
| Theology | study of religion and religious ideas |
| Abiogenesis | spontaneous generation |
| Amphibious | able to live both on land and water |
| Antibiotic | antibacterial substance produced by a living organism |
| Autobiography | story of a person's life written by that person |
| Biochemistry | chemistry dealing with chemical compounds and processes in living plants and animals |
| Biocidal | destructive to life or living things |
| Biodegradable | capable of being readily decomposed into harmless substances by living microorganisms |
| Biogenesis | development of life from preexisting life |
| Biography | story of a person's life written by another person |
| Biology | science dealing with the study of living organisms |
| Biometry | statistical calculation of the probable duration of human life |
| Biometrics | statistical analysis of biologic data |
| Biopsy | diagnostic examination of a piece of tissue from the living body |
| Biota | the living plants and living animals of a region |
| Microbe | very minute living organism; microorganism; germ |
| Symbiosis | the living together in mutually helpful association of two dissimilar organisms |
| Anatomy | structure of a plant or animal |
| Appendectomy | surgical removal of the appendix |
| Atom | smallest particle of an element |
| Atomizer | device for converting a liquid to a fine spray |
| Dichotomy | cutting or division into two |
| Gastrectomy | surgical removal of part or all of the stomach |
| Lobotomy | brain surgery for treatment of certain mental disorders |
| Mastectomy | surgical removal of a breast |
| Phlebotomy | opening of a vein to diminish the blood supply |
| Tome | one volume of a work of several volumes in books |
| Tonsillectomy | surgical removal of the tonsils |
| Tracheotomy | surgical operation of cutting into the windpipe |
| Antipodes | parts of the globe that are diametrically opposite |
| Arthropod | any invertebrate with jointed legs. |
| Chiropodist | one who treats ailments of the human foot |
| Dipody | a line of poetry |
| Podiatrist | chiropodist |
| Podium | raised platform |
| Pseudopod | temporary extension of the protoplasm, as in the ameba, to enable the organism to move around and take in food |
| Tripod | caldron having three legs |
| Unipod | one-legged support |
| Homochromatic | having the same color |
| Heterochromatic | having different colors |
| Homogeneous | of the same kind |
| Heterogeneous | differing in kind |
| Homology | fundamental similarity of structure |
| Heterology | lack of correspondence between parts |
| Homomorphic | exhibiting similarity of form |
| Heteromorphic | exhibiting diversity of form |
| Homonym | word that sounds like another but differs in meaning and spelling |
| Heteronym | word spelled like another but differing in sound and meaning |
| Homocentric | having the same center |
| Homophonic | having the same sound |
| Heteroclite | person or thing deviating from the common rule |
| Heterodox | opposed to accepted beliefs or established doctrines |
| Hyperacidity | excessive acidity |
| Hypoacidity | weak acidity |
| Hyperglycemia | excess of sugar in the blood |
| Hypoglycemia | abnormally low level of sugar in the blood |
| Hypertension | low blood sugar |
| Hyperthermia | especially high fever; hyperpyrexia |
| Hypothermia | subnormal body temperature |
| Hyperthyroid | marked by excessive activity of the thyroid gland |
| Hypothyroid | marked by deficient activity of the thyroid gland |
| Hyperactive | overactive |
| Hyperbole | extravagant exaggeration of statement |
| Hypercritical | overcritical |
| Hyperemia | superabundance of blood |
| Hyperopia | farsightedness |
| Hypersensitive | excessively sensitive |
| Hypertrophy | enlargement of a body part or organ, as from excessive use |
| Hypodermic | injected under the skin |
| Hypothesis | theory or supposition assumed as a basis for reasoning |
| Hypothetical | assumed without proof for the purpose of reasoning |
| Endocrine | secreting internally |
| Exocrine | secreting externally |
| Endogamy | marriage within the tribe |
| Exogamy | marriage outside the tribe |
| Endogenous | produced from within |
| Exogenous | produced from without |
| Endoskeleton | hard protective structure developed outside the body |
| Endosmosis | osmosis inward |
| Exosmosis | osmosis outward |
| Endocarditis | inflammation of the lining of the heart |
| Endoderm | membrane-like tissue lining the digestive tract |
| Endoparasite | parasite living in the internal organs of an animal |
| Endophyte | plant growing within another plant |
| Exoteric | readily understandable |
| Exotic | introduced from a foreign country |