pleomorphic adjective. [pli:ǝ'mɔ:fɪk] Also (rare) pleiomorphic ['plʌɪǝ-]. L19.
[from PLEO- + Greek morphē form + -IC.]
Having more than one form; of variable form; spec. (a) Biology exhibiting different forms at different stages of the life cycle, as certain bacteria, protozoans, parasitic fungi, etc.; (b) Chemistry & Mineralogy crystallizing in two or more fundamentally different forms; polymorphic; (c) Medicine designating or pertaining to a tumour of highly variable structure, esp. an adenoma of the salivary gland (usu. benign).

■ pleomorphism noun the fact or condition of being pleomorphic M19.

■ 'pleomorphy noun = pleomorphism L19.

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