Main Entry: al·lot·ro·py

Pronunciation: \ə-ˈlä-trə-pē\

Function: noun

Inflected Form(s): plural al·lot·ro·pies

Date: 1850

: the existence of a substance and especially an element in two or more different forms (as of crystals) usually in the same phase

— al·lo·trop·ic \ˌa-lə-ˈträ-pik\ adjective