/ Dictionary / Index P protolithic: Meaning and Definition of Find definitions for: pro•to•lith•ic Pronunciation: (prōt"l-ith'ik), [key] — adj. Anthropol. noting or pertaining to stone implements selected according to suitability of the form to a particular purpose without definite shaping on the part of the user. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. protolanguage protolog Related Content Daily Word Quiz: fresco Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language