polymorphic

monimuotoinen relating to polymorphism (any sense), able to have several shapes or forms
1859, Charles Darwin, On the Origin of Species

I refer to those genera which have sometimes been called "protean" or "polymorphic," in which the species present an inordinate amount of variation; and hardly two naturalists can agree which forms to rank as species and which as varieties.

Dr. Beddersley came -- a dapper little man, with pent-house eyebrows, and keen, small eyes, whom I suspected at sight of being Colonel Clay himself in another of his clever polymorphic embodiments.

Polymorphic redefinition in C++ is achieved by the use of virtual functions.