angstrom

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

noun

  • a unit of length equal to one hundred-millionth of a centimetre, 10−10 metre, used mainly to express wavelengths and interatomic distances.

Origin:

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