- mu - the 12th letter of the Greek alphabet
--1 is a kind of mammal genus; letter, letter of the alphabet, alphabetic character; mammal genus; letter, letter of the alphabet, alphabetic character
--1 is a member of
--1 has members: house mouse, Mus musculusMuridae, family Muridae; 1 sense of mu ; mu; Greek alphabet; Mus, genus Mus; Muridae, family Muridae; 1 sense of mu ; mu; Greek alphabet