polymorphism; polymorphic. Compare with isotope and allotrope. Solid substances that occur in several distinct forms. Polymorphs have different chemical and physical properties. allotropes are polymorphs of elements. Found on http://antoine.frostburg.edu/chem/senese/101/glossary/p.shtml
A mineral that is identical to another mineral in chemical composition but differs from it in crystal structure. Eganpmes: Diamond and graphite or Rutile, Brookite, and Anatase. Found on http://www.encyclo.co.uk/local/22291
Pol'y·morph noun [ Greek ... multiform; poly`s many + ... form: confer French polymorphe .] (Crystallog.) A substance capable of crystallizing in several distinct forms; also, any one of these forms. Confer Allomorph . Found on http://www.encyclo.co.uk/webster/P/122