PLEOMORPHISM Scrabble 23 Words With Friends 27 Definition noun (chemistry) the existence of different kinds of crystal of the same chemical compound. — synonyms: polymorphism noun (biology) the appearance of two or more distinctly different forms in the life cycle of some organisms. See all 620 words you can make from PLEOMORPHISM → 12-letter words Words starting with P Words ending with M ← Unscramble different letters