a.u

A.U.

angstrom unit.
Also, a.u.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Abbreviations & Acronyms
a.u.
angstrom unit
A.U.
Latin auris uterque (each ear, both ears)
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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