polymorphism

We now understand the process by which a polymorphic race maintains its polymorphism.

Four days later, after the fourth ecdysis, the dimorphism becomes a polymorphism.

On these grounds I designate the phenomenon as polymorphism, although it may not yet have reached, as such, its sharpest limits.

It is chiefly amongst the microscopic species that polymorphism has been determined.

This system of reproduction is again noticed more in detail in the chapter on polymorphism.