/ Dictionary / Index A Arg: Meaning and Definition of Find definitions for: Arg Pronunciation: [key] — Biochem. Biochem. arginine. Arg. Pronunciation: [key] Argentina. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. arfvedsonite argal Related Content Daily Word Quiz: languid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language