heteromorphic

adjective

1. Biology. dissimilar in shape, structure, or magnitude.
2. Entomology. undergoing complete metamorphosis; possessing varying forms.

adjective biology

1. differing from the normal form in size, shape, and function
2. (of pairs of homologous chromosomes) differing from each other in size or form
3. (esp of insects) having different forms at different stages of the life cycle