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]