/ Dictionary / Index C combining weight: Meaning and Definition of Find definitions for: combin'ing weight" Pronunciation: [key] — Chem. Chem. the atomic weight of an atom or radical divided by its valence. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. combining form comb jelly Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language