/ Dictionary / Index U urethane: Meaning and Definition of Find definitions for: u•re•thane Pronunciation: (yoor'u-thān"), [key] — n. Chem. any derivative of carbamic acid having the formula CHNOR. Also calleda white, crystalline, water-soluble powder, CHNO: used chiefly as a solvent, in organic synthesis, as a fungicide and pesticide, and formerly in cancer treatment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: urethane (Thesaurus) ureterostomy urethr- Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language