- The property of crystallizing in three forms
fundamentally distinct, as is the case with titanium dioxide, which
crystallizes in the forms of rutile, octahedrite, and brookite. See
Pleomorphism. - The coexistence among individuals of the same species
of three distinct forms, not connected, as a rule, by intermediate
gradations; the condition among individuals of the same species of
having three different shapes or proportions of corresponding parts; --
contrasted with polymorphism, and dimorphism.
Definition
[ n.]