/ Dictionary / Index G genetic relationship: Meaning and Definition of Find definitions for: genet'ic rela'tionship Pronunciation: [key] — Historical Ling. Historical Ling. the relationship that exists between languages that have developed from a single earlier language. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. genetic marker genetics 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