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erry), or when there are two forms of one or both sexes of the same species of butterfly. Dimorphism is the condition of the appearance of the same species under two dissimilar forms. Darwin.

Isomorphism between the two forms severally of two dimorphous substances.

Having the property of dimorphism; dimorphous.

Characterized by dimorphism; occurring under two distinct forms, not dependent on sex; dimorphic.

ion, in one species of plants, of only one kind of flowers; -- opposed to heteromorphism, dimorphism, and trimorphism.

Having the quality of isodimorphism.

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

Of or pertaining to the seasons. Seasonal dimorphism (Zoöl.), the condition of having two distinct varieties which appear at different seasons, as certain species of butterflies in which the spring brood differs from the summer or autumnal brood.

ourse, connection, or commerce; sexual desire; sexual diseases; sexual generation. Sexual dimorphism (Biol.), the condition of having one of the sexes existing in two forms, or varieties, differing in color, size, etc., as in many species of butterflies which have two kinds of females. -- Sexual method (Bot.), a metho…

ferent shapes or proportions of corresponding parts; -- contrasted with polymorphism, and dimorphism. Heterogonous trimporphism (Bot.), that condition in which flowers of plants of the same species have three different lengths of stamens, short, medium, and long, the blossoms of one individual plant having short and me…