u·re·thane 
(yrĭ-thān′) also u·re·than (-thăn′)
(yrĭ-thān′) also u·re·than (-thăn′)n.
1. A colorless or white crystalline compound, CO(NH2)OC2H5, used in organic synthesis and formerly as a palliative treatment for leukemia. Also called ethyl carbamate.
2. Any of several esters, other than the ethyl ester, of carbamic acid.
[UR(O)-1 + ETH(YL) + -ANE.]