[ure.thane] or ure.than n [F urethane, fr. ur- [1]ur- + eth- eth- + -ane] (1838) 1 a: a crystalline compound that is the ethyl ester of carbamic acid and is used esp. as a solvent and medicinally as an antineoplastic agent b: an ester of carbamic acid other than the ethyl ester
2: polyurethane