mer- I. combining form Etymology: Middle English, from mere sea, lake, pond, from Old English — more at marine : sea < mermaid > < merman > < merwoman > II. combining form ormero- Etymology: Greek mēr-, mēro-, from mēros — more at member : thigh < meralgia > < merocele > III. combining form ormero- Etymology: International Scientific Vocabulary, from Greek, from meros part — more at merit : part : partial < meraspis > < merohedral > < merosporangium >