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[ang-struh m] /ˈæŋ strəm/
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.
Origin of angstrom
1895-1900; named after A. J. Ångström Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for angstrom-unit


/ˈæŋstrʌm; -strəm/
Also called angstrom unit. 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 Å, A
Word Origin
C20: named after Anders J. Ångström
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for angstrom-unit



unit of length equal to one hundred millionth of a centimeter (used to measure wavelengths of light), 1892, named for Swedish physicist Anders Ångström (1814-1874).

Online Etymology Dictionary, © 2010 Douglas Harper
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angstrom-unit in Medicine

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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angstrom-unit in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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