(ˈ)trī|mȯrˌfizəm noun
( -s )
Etymology: International Scientific Vocabulary trimorph- (from Greek trimorphos having three forms) + -ism
1. : polymorphism in which there are three distinct forms of a species or of a particular caste — compare dimorphism a
2. : occurrence of three distinct forms of organs (as leaves or flowers) on individuals of the same species : heterogony
3. : the property of crystallizing in three different forms