/ Dictionary / Index P protomartyr: Meaning and Definition of Find definitions for: pro•to•mar•tyr Pronunciation: (prō'tō-mär"tur), [key] — n. the first Christian martyr, Saint Stephen. the first martyr in any cause. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. protolog protomorphic Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language