Mu
Mu or MU may refer to:- mu (lowercase μ, uppercase Μ), a letter in the Greek alphabet
- Mu, a hypothetical lost continent in the Pacific Ocean
- mu (無), a Japanese word important in Zen
- mu (亩), Chinese unit of measurement equal to 666.7 square metres
- Mauritius (MU) ISO country code
- multiple unit (MU), such as a rail diesel car
- University of Missouri - Columbia (MU), "Missouri University"
- The SI prefix micro.
- In physics, the friction coefficient and mass per unit length.