/ Dictionary / Index P proteinoid: Meaning and Definition of Find definitions for: pro•tein•oid Pronunciation: (prō'tē-noid", -tē-u-), [key] — n. Biochem. a polymer of amino acids resembling a biological polypeptide but formed abiotically: suggested as a possible intermediate in protein development during primitive earth conditions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. protein coat protein synthesis Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language