dimorphism

1.二形性

2.双晶现象;二态性

3.二态现象

4.二型现象

5.双型

1.the existence of two or more different forms within a biological species. In sexual dimorphism, male and female may vary in color, size, or some other trait.

2.the existence in a plant of two different forms of the same organ or part, as when there are two forms of flowers

3.the existence of a substance in two different crystalline forms