/ Dictionary / Index R rayon: Meaning and Definition of Find definitions for: ray•on Pronunciation: (rā'on), [key] — n. a regenerated, semisynthetic textile filament made from cellulose, cotton linters, or wood chips by treating these with caustic soda and carbon disulfide and passing the resultant solution, viscose, through spinnerets. fabric made of this filament. —adj. made of rayon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rayon (Thesaurus) Raynaud's disease rayonny Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language