trimorph

A substance that occurs in three distinct crystalline forms.

One of the crystalline forms in which a trimorphic substance occurs.

In crystallography, a substance which exhibits trimorphism, or one of the three forms which such a substance presents: thus the term may be applied to titanium dioxid, or to rutile, one of its three forms of crystallization.

A substance which crystallizes in three distinct forms, or which has three distinct physical states; also, any one of these distinct forms. See trimorphism, 1.

A substance which crystallizes in three distinct forms, or which has three distinct physical states.