Breadcrumb Home > Dictionary > Index G genethliac: Meaning and Definition of Find definitions for: ge•neth•li•ac Pronunciation: ( ju-neth'lē-ak"), [key] — adj. Astrol. of or pertaining to birthdays or to the position of the stars at one's birth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gene therapy genethlialogy ✖ Related Content Daily Word Quiz: temporize Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language