/ Dictionary / Index G gram-molecular weight: Meaning and Definition of Find definitions for: gram'-molec'ular weight'. Pronunciation: [key] SeeAbbr.: GMW Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gramme gram molecule Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language