/ Dictionary / Index C cellulose acetate: Meaning and Definition of Find definitions for: cel'lulose ac'etate Pronunciation: [key] any of a group of acetic esters of cellulose, used to make yarns, textiles, nonflammable photographic films, rubber and celluloid substitutes, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cellulose cellulose gum Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language