The Collaborative International Dictionary of English v.0.48:
Macrocheira \Macrocheira\ peop. n. A genus of giant crabs of Japan. Syn: genus Macrocheira. [WordNet 1.5]WordNet (r) 3.0 (2006):
Macrocheira n 1: giant crabs of Japan [syn: Macrocheira, genus Macrocheira]