pleomorphism

n 1: (chemistry) the existence of different kinds of crystal of

the same chemical compound [syn: {polymorphism}]

2: (biology) the appearance of two or more distinctly different

forms in the life cycle of some organisms

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.