/ Dictionary / Index O oligogene: Meaning and Definition of Find definitions for: ol•i•go•gene Pronunciation: (ol'i-gō-jēn", u-lig'u-), [key] — n. Genetics. a gene that produces or significantly affects the expression of a qualitative heritable characteristic, acting either alone or with a few other genes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oligodontia oligomenorrhea Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language