Source : Webster's Revised Unabridged Dictionary (1913)

Homomorphism \Ho`mo*mor"phism\, n. [See {Homomorphous}.]
   1. (Biol.) Same as {Homomorphy}.

   2. (Bot.) The possession, in one species of plants, of only
      one kind of flowers; -- opposed to heteromorphism,
      dimorphism, and trimorphism.

   3. (Zo["o]l.) The possession of but one kind of larv[ae] or
      young, as in most insects.

Source : WordNet®

homomorphism
     n : similarity of form [syn: {homomorphy}]

Source : Free On-Line Dictionary of Computing

homomorphism
     
        A map f between groups A and B is a homomorphism of A into B
        if
        	f(a1 * a2) = f(a1) * f(a2)  for all a1,a2 in A.
     
        where the *s are the respective group operations.