/ Dictionary / Index C Celotex: Meaning and Definition of Find definitions for: Cel•o•tex Pronunciation: (sel'u-teks"), [key] — Trademark. Trademark. a brand of board made of cane fiber, used for insulation or as a vapor barrier, siding, or layer under a roof. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. celosia Cels. 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