mu

/mjuː/
noun
  1. The 12th letter of the Greek alphabet (Μ, μ).
    • She wrote the symbol for mu on the chalkboard.
    • In physics, mu represents the coefficient of friction.
    • The Greek letter mu is often used in mathematics and science.
  2. A unit of length equal to one micrometer (micron), often used in scientific contexts.
    • The microscope can resolve details down to 0.2 mu.
    • The thickness of the film was measured in mu.
    • Bacteria are typically a few mu in size.
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