The Collaborative International Dictionary of English v.0.48:

Amine \Am"ine\ (?; 277), n. [Ammonia + -ine.] (Org. Chem.)
   One of a class of basic substances derived from ammonia by
   replacement of one or more hydrogen atoms by an alkyl or aryl
   group. Compare amide, in which an acyl group is attached to
   the nitrogen. Hydroxylamine and hydrazine, which are not an
   organic compounds, are also basic and may also be considered
   amines.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

amine
    n 1: a compound derived from ammonia by replacing hydrogen atoms
         by univalent hydrocarbon radicals [syn: amine,
         aminoalkane]