μ (EN)

letter, symbol, symbol

letter “μ”

1. the twelfth letter of the Greek alphabet, mu
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   In physics equations, the Greek letter μ is often used to represent different constants.

symbol “μ”

1. (in statistics) the symbol for the population mean
   In statistics, μ represents the average of a population, such as the average height of all students in a school.
2. (in physics) the symbol for the coefficient of friction
   The equation uses μ to denote friction between surfaces, helping engineers calculate how materials will slide over each other.
3. (in physics) the symbol for permeability
   The material's permeability, μ, determines how it responds to magnetic fields, which is important in designing electromagnets.

symbol “μ”

1. (in measurements) a prefix meaning micro-, or one millionth (10⁻⁶)
   The size of the bacteria is about 2 μm which is very small.