| Term | Definition |
| anthropology | science dealing with origin, races, customs, and beliefs of human kind |
| bacteriology | science dealing with the study of bacteria |
| biology | science dealing with the study of living organisms |
| cardiology | science dealing with the actions and diseases of the heart |
| criminology | scientific study of crimes and criminals |
| dermatology | science dealing with the skin and its diseases |
| ecology | science dealing with the relation of living things to their environment and to each other |
| ethology | 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 atmosphere and weather |
| morphology | scientific study of the forms and structures of plants and animals; form and structure of an organism or any of its parts |
| mythology | account or study of myths |
| necrology | list of persons who have died recently; obituary |
| neurology | scientific study of the nervous system and its diseases |
| paleontology | science dealing with life in the remote past as recorded in fossils |
| pathology | scientific study of the nature and causes of disease; something abnormal |
| 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 human society |
| technology | use of science to achieve practical purpose; applied science; engineering |
| theology | study of religion and religious ideas |
| abiogenesis | spontaneous generation |
| amphibious | able to live both on land and in water; attacking with coordinated land, sea, and air forces |
| antibiotic | germ-killing substance produced by or derived from a microorganism |
| 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 microorganisms |
| biogenesis | development of life from preexisting life |
| biography | story of a person's life written by another person |
| biometry | statistical analysis of biological data |
| biopsy | diagnostic examination of a piece of tissue from the living body |
| biota | plants (flora) and animals (fauna) living in a region |
| microbe | microscopic life form; microorganism; germ |
| symbiosis | living together in a mutually helpful association of two dissimilar organisms |
| anatomy | dissection of plants, animals, or other things to study their structure; analysis; structure |
| appendectomy | surgical removal of the appendix |
| atom | smallest particle of an element |
| atomizer | device for converting liquid into a fine spray |
| dichotomy | cutting or division into two; division |
| gastrectomy | surgical removal of all or part of the stomach |
| lobotomy | brain surgery for treatment of some mental disorders |
| mastectomy | surgical removal of the breast |
| phlembotomy | opening of a vein to diminish blood supply |
| tome | one volume, or "cut", of a work of several volumes; scholarly book |
| tonsillectomy | surgical removal of the tonsils |
| tracheotomy | surgical operation of cutting into the trachea |
| antipodes | parts of the globe (or their inhabitants) diametrically opposite to each other |
| arthropod | invertebrate with jointed legs |
| chiropodist | one who treats ailments of the human foot |
| dipody | verse of poetry consisting of two feet; a dimeter |
| podiatrist | chiropodist |
| podium | dias; raised platform; low wall serving as a foundation |
| pseudopod | temporary extension of the protoplasm, as in the ameba, to enable the organism to move and take in food |
| tripod | utensil, stool, or caldron having three legs |
| unipod | one-legged support |
| homochromatic | having the same color; monochromatic; unicolor |
| heterochromatic | having different colors |
| homogeneous | of the same kind; similar; uniform |
| heterogeneous | differing in kind; dissimilar; varied |
| homology | similarity in structure |
| heterology | dissimilarity in structure |
| 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 lime another, but differing in sound and meaning |
| homocentric | having the same center; concentric |
| homophonic | having the same sound or voice |
| heteroclite | deviating from the common rule; abnormal; atypical |
| heterodox | opposed to accepted beliefs or established doctrines, especially in religion |
| hyperacidity | excess acidity |
| hypoacidity | weak acidity |
| hyperglycemia | excess sugar in the blood |
| hypoglycemia | abnormally low level of sugar in the blood |
| hypertension | abnormally high blood pressure |
| hypotension | low blood pressure |
| 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; supersensitive |
| hypertrophy | excessive growth and development, as in a body part |
| hypodermic | injected under the skin |
| hypothesis | theory or supposition assumed as a basis for reasoning |
| hypothetical | assumed without proof for the purpose of reasoning; conjectural |
| endocrine | secreting internally |
| exocrine | secreting externally |
| endogamy | marriage within a tribe, caste, or social group |
| exogamy | marriage outside the tribe, caste, or social group |
| endogenous | produced from within; due to internal causes |
| exogenous | produced from without; due to external causes |
| endoskeleton | internal skeleton or supporting framework in an animal |
| exoskeleton | hard protective structure developed outside the body |
| endosmosis | osmosis inward |
| exosmosis | osmosis outward |
| endocarditis | inflammation of the lining of the heart |
| endoderm | membranelike tissue lining the digestive tract |
| endoparasite | parasite living on the inside of its host |
| endophyte | plant growing within another plant |
| exoteric | known externally; readily understandable |
| exotic | introduced from another country; foreign; strikingly unusual; strange |
| anarchy | total absence of rule or government; confusion; disorder |
| autarchy | rule by absolute sovereign |
| hierarchy | body of rulers or officials grouped in ranks, each being subordinate to the rank above it; pecking order |
| matriarchy | form of social organization in which the mother rules the family or tribe, descent being traced through the mother |
| monarchy | state ruled over by a single person, as a king or queen |
| oligarchy | form of government in which a few people have the power |
| patriarchy | form of social organization in which the father ruled the family or tribe, descent being traced through the father |
| geocentric | measured from the earth's center; having the earth as a center |
| geodetic | pertaining to geodesy (mathematics dealing with the earth's shape and dimensions) |
| geography | study of the earth's surface, climate, continents, people, products, etc. |
| geometry | mathematics dealing with lines, angles, surfaces, and solids |
| geomorphic | pertaining to the shape of the earth or the form of its surface |
| geophysics | science treating of the forces that modify the earth |
| geopolitics | study of government and its policies as affected by physical geography |
| geoponics | art or science of agriculture |
| geogic | agriculture |
| georgic | poem on husbandry (farming) |
| geotropism | response to earth's gravity, as the growing of roots downward into the ground |
| apogee | farthest point from the earth in the orbit of a heavenly body |
| antipathy | aversion; dislike |
| apathy | lack of feeling, emotion, interest, or excitement; indifference |
| empathy | complete understanding of another's feelings, motives, etc. |
| pathetic | arousing pity |
| pathos | quality in drama, speech, music, literature, or events that arouses a feeling of pity or sadness |
| sympathy | sharing of another's trouble; compassion |
| telepathy | transference of the thoughts and feelings of one person to another by no apparent means of communication |
| homeopathy | treatment of disease with minute doses of a remedy that, if given in massive doses to healthy persons, would produce effects like those of the disease |
| osteopath | practitioner of treatment of disease by manipulating of bones, muscles, nerves, etc. |
| pathogenic | causing disease |
| pathological | due to disease |
| psychopathic | pertaining to mental disease; insane |
| amorphous | having no definite form; shapeless; unorganized |
| anthropomorphic | attributing human form or characteristics to beings not human, especially gods |
| dimorphous | occurring under two distinct forms |
| endomorphic | having a form deriving largely form the embryo's inner layer; having a heavy body build |
| heteromorphic | exhibiting diversity of form |
| metamorphosis | change of form |
| monomorphic | having a single form |
| morphology | branch of biology dealing with the form and structure of animals and plants; form and structure of an organism or any of its parts |
| pericardium | membranous sac enclosing the heart |
| perigee | nearest point to the earth in the orbit of a heavenly body |
| peihelion | nearest point to the sun in the orbit of a heavenly body |
| perimeter | whole outer boundary or measurement of a surface or figure |
| periodontics | branch of dentistry dealing with diseases of the bone and gum tissues supporting the teeth |
| peripatetic | traveling about; itinerant |
| peripheral | on the outside boundary; outside or away from the central part; only slightly connected with what is essential; merely incidental |
| peripheral | device that can be attached to or used with a computer |
| periphrastic | expressed in a roundabout way; circumlocutory |
| periscope | instrument permitting those in a submarine a view of the surface |
| peristalsis | wavelike contraction of the walls of the intestines, which propels the contents onward |
| peristyle | row of columns around a building or court; the space so inclosed |
| peritonitis | inflammation of the peritoneum |