The property of crystallizing under two or more distinct fundamental forms, including dimorphism and trimorphism.

The theory that the various genera of bacteria are phases or variations of growth of a number of Protean species, each of which may exhibit, according to undetermined conditions, all or some of the forms characteristic of the different genera and species.

existence of variant forms in the same species or strain of microorganisms

(chemistry) the existence of different kinds of crystal of the same chemical compound

The assumption of various distinct forms by a single organism or species