- Enter a word for the dictionary definition.
From The Collaborative International Dictionary of English v.0.48:
Urethane \U*reth"ane\, n. [F. ur['e]thane. See Urea; Ether.] 1. (Org. Chem.) A white crystalline substance, NH2.CO.OC2H5, produced by the action of ammonia on ethyl carbonate or by heating urea nitrate and ethyl alcohol. It is used as a hypnotic, antipyretic, and antispasmodic. Hence, any ester of carbamic acid. [Webster 1913 Suppl.] 2. same as polyurethane. [PJC]