Definition of angstrom in English:

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Pronunciation: /ˈaŋstrəm/
(also ångström /ˈɒŋstrəːm/, angstrom unit , abbreviation Å)


A unit of length equal to one hundred-millionth of a centimetre, 10−10 metre, used mainly to express wavelengths and interatomic distances.
Example sentences
  • An angstrom, a unit of length measuring the wavelength of light, is about 500,000 times smaller than the thickness of a human hair.
  • The Mg 2 + cations were initially positioned several angstroms from the solute.
  • Since an angstrom is a tenth of a millionth of a metre, that's pretty small.


Late 19th century: named after A. J. Ångström (see Ångström, Anders Jonas).

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