Definition of angstrom noun from the Oxford Advanced Learner's Dictionary

 

angstrom

 noun
noun
BrE BrE//ˈæŋstrəm//
 
; NAmE NAmE//ˈæŋstrəm//
 
(chemistry, physics)
 
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a very small unit of length, equal to 1x10-10 metre, used for measuring wavelengths and the distance between atoms Word Origin late 19th cent.: named after A. J. Ångström (1814-1874), the Swedish physicist.
See the Oxford Advanced American Dictionary entry: angstrom