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The ångström or angstrom (IPA: /ˈɔːŋstrəm/); Swedish: [ˈɔŋstrøm]) is a unit of length equal to 10−10 m (one ten-billionth of a metre) or 0.1 nanometre. Its symbol is Å, a letter in theSwedish alphabet.
The smoot /ˈsmuːt/ is a nonstandard, humorous unit of length created as part of an MIT fraternity prank.