Plē'o-môr'phism, n.

n. [Gr. πλείων, more, and μορφή, form.] The property of crystallizing under two or more distinct fundamental forms, called dimorphism when there are two forms, and trimorphism when there are three forms;—said of various substances, as carbon, which occurs in octahedral and related forms in the diamond, and in hexagonal prisms in graphite. Dana.