The Collaborative International Dictionary of English v.0.48:

Carbamine \Car*bam"ine\ (k[aum]r*b[a^]m"[i^]n or -[=e]d), n.
   (Chem.)
   An isocyanide of a hydrocarbon radical. The carbamines are
   liquids, usually colorless, and of unendurable odor.
   [1913 Webster]