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Definition of: urethan
(y
r′ə·than′, y·reth′ən) noun Chem.
1. A white crystalline compound, C3H7NO2, derived from carbamic acid by substituting ethyl for the hydrogen of the hydroxyl group: some of its derivatives are used as hypnotics and sedatives: also called ethylurethane.
2. Any ester of carbamic acid. Also u·re·thane (yr′ə·thān′, y·reth′ān). [<UR(EA) + ETHAN(E)]
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