- the state or condition of being polymorphous.
- crystallization into two or more chemically identical but crystallographically distinct forms.
- the existence of an organism in several form or color varieties as a result of discontinuous variation.
- the presence of two or more distinct phenotypes in a population due to the expression of different alleles of a given gene, as human blood groups O, A, B, and AB.
- biology
- the occurrence of more than one form of individual in a single species within an interbreeding population
- the occurrence of more than one form in the individual polyps of a coelenterate colony
- the existence or formation of different types of crystal of the same chemical compound
