Urethane /(?)/

U·reth·ane

Urethane

n.
  1. 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. (Org. Chem.)
  2. same as polyurethane.