/ Dictionary / Index O opisthognathous: Meaning and Definition of Find definitions for: op•is•thog•na•thous Pronunciation: (op"is-thog'nu-thus), [key] — adj. Zool. having receding jaws. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: opisthognathous (Thesaurus) opisthodomos opisthograph Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language