Chem. [f. ACE[TIC] + DIAMINE.] An amine of composition C2N2H6 = (H2C)C | =NH/–NH2, also called Ethenyl-diamine, or Methyl-methenyl-diamine, derived from two molecules of ammonia in one of which H, in the other H2 are replaced collectively by the trivalent radical Ethenyl (C2H3)′″.
1877. Watts, Fownes’ Chem., II. 225.
