/ Dictionary / Index G gnathite: Meaning and Definition of Find definitions for: gna•thite Pronunciation: (nā'thīt, nath'īt), [key] — n. Anat. any of the mouth appendages of an insect or other arthropod. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gnathion gnathonic Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language