/ Dictionary / Index G genetic marker: Meaning and Definition of Find definitions for: genet'ic mark'er Pronunciation: [key] any distinct inheritable indicator of identity and ancestry. See a chromosomal landmark or allele that allows for the tracing of a specific region of DNA, as in the study of recombination. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. genetic map genetic relationship 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