/ Dictionary / Index A agnathous: Meaning and Definition of Find definitions for: ag•na•thous Pronunciation: (ag'nu-thus), [key] — adj. Zool. having no jaws. belonging or pertaining to the class Agnatha. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. agnathan agnel Related Content Daily Word Quiz: pedagogy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language