polymorphPronunciation: /ˈpɒlɪmɔːf/Definition of polymorph noun an organism or inorganic object or material which takes various forms. Physiology a polymorphonuclear leucocyte. Origin: early 19th century: from Greek polumorphos, from polu- 'many' + morphē 'form'polymorph in other Oxford dictionaries Definition of polymorph in the US English dictionary