The Collaborative International Dictionary of English v.0.48:

Carbamide \Car*bam"ide\ (k[aum]r*b[a^]m"[i^]d or -[imac]d), n.
   [Carbonyl + amide.] (Chem.)
   The technical name for urea.
   [1913 Webster]

WordNet (r) 3.0 (2006):

carbamide
    n 1: the chief solid component of mammalian urine; synthesized
         from ammonia and carbon dioxide and used as fertilizer and
         in animal feed and in plastics [syn: urea, carbamide]