Also known as: au.
AU has various meanings in the English category. Discover the full forms, definitions, and usage contexts of AU in English.
Angstrom , unit of length used chiefly in measuring wavelengths of light, equal to 10 10 metre, or 0.1 nanometer. It is named for the 19th-century Swedish physicist Anders Jonas Angstrom.
English(A) A unit of linear measure equal to 10( 10)m, or 0.1 nm; not an accepted Si unit, but still sometimes used for small distances such as interatomic distances and some wavelengths. OR A unit of wave length, equal in length to one ten billionth. OR A unit of linear measure equal to 10-10 m, or 0.1 nm (nanometer), sometimes used to express small distances such as interatomic distances and some wavelengths.
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