/ Dictionary / Index O onychia: Meaning and Definition of Find definitions for: o•nych•i•a Pronunciation: (ō-nik'ē-u), [key] — n. Pathol. inflammation of the matrix of the nail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. onward onychophagia Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language