Learn how to say Mu correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mu:
the twelfth letter of the Greek alphabet (Μ, μ), transliterated as ‘m’.
(Mu) [followed by Latin genitive] Astronomy the twelfth star in a constellation:
[as modifier] Physics relating to muons:
(μ) [in combination] ‘micro-‘ in symbols for units:
the recommended daily amount is 750μg