angstrom unit


noun (often initial capital letter)
a unit of length, equal to one tenth of a millimicron, or one ten millionth of a millimeter, primarily used to express electromagnetic wavelengths. Symbol: Å; Abbreviation: A
Also called angstrom unit, Angstrom unit.

1895–1900; named after A. J. Ångström Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
angstrom (ˈæŋstrʌm, -strəm)
Also called: angstrom unit, Å, A a unit of length equal to 10--10 metre, used principally to express the wavelengths of electromagnetic radiations. It is equivalent to 0.1 nanometre
[C20: named after Anders J. Ångström]

Ångström (ˈæŋstrəm, Swedish ˈɔŋstrœm)
Anders Jonas (ˈandərs ˈjuːnas). 1814--74, Swedish physicist, noted for his work on spectroscopy and solar physics

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

unit of length equal to one hundred millionth of a centimeter (used to measure wavelengths of light), 1892, named for Swed. physicist Anders Ångström (1814-1874).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

angstrom ang·strom or ång·strom (āng'strəm)
Abbr. A, Å, angst
A unit of length equal to one hundred millionth (10-8) of a centimeter, used especially to specify radiation wavelengths.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
angstrom   (āng'strəm)  Pronunciation Key 
A unit of length equal to one hundred-millionth (10-10) of a meter. It was once used to measure wavelengths of light and the diameters of atoms, but has now been mostly replaced by the nanometer.
Ångström   (āng'strəm)  Pronunciation Key 
Swedish physicist and astronomer who pioneered the use of the spectroscope in the analysis of radiation. By studying the spectrum of visible light given off by the Sun, Ångström discovered that there is hydrogen in the Sun's atmosphere. The angstrom unit of measurement is named for him.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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