/ Dictionary / Index C celloidin: Meaning and Definition of Find definitions for: cel•loi•din Pronunciation: (su-loi'din), [key] — n. a concentrated form of pyroxylin used to embed tissues for cutting and microscopic examination. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cellobiose cellophane Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language