/ Dictionary / Index G GMP: Meaning and Definition of Find definitions for: GMP Pronunciation: [key] — Biochem. Biochem. guanosine monophosphate: a ribonucleotide constituent of ribonucleic acid that is the phosphoric acid ester of the nucleoside guanosine. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gmc GMT Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language