/ Dictionary / Index G genetics: Meaning and Definition of Find definitions for: ge•net•ics Pronunciation: ( ju-net'iks), [key] — n. (used with a sing. v.) the science of heredity, dealing with resemblances and differences of related organisms resulting from the interaction of their genes and the environment. the genetic properties and phenomena of an organism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: genetics (Thesaurus) genetic relationship genetic screening Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language