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au

[oh] /oʊ/
plural aux
[oh] /oʊ/ (Show IPA).
French.
1.
to the; at the; with the.
Compare à la.

Au

1.
author.
Also, au.
2.
Symbol, Chemistry. gold.
Origin of Au
From the Latin word aurum

A.U.

or a.u

1.
angstrom unit.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for au
Contemporary Examples
Historical Examples
  • She is going to the coast for the season, and I called to-night to say au revoir.

  • “‘Say au revoir, but not good-by,’” sang Miss Sherborne sentimentally.

    Cap'n Warren's Wards Joseph C. Lincoln
  • "Well, au revoir," he cried in a strained voice, and then fled down the stairs.

    The Christian Hall Caine
  • "au rvoir, M. de Luynes," he said significantly as he got into the saddle.

    The Suitors of Yvonne Raphael Sabatini
  • Malhereux au jeux, heureux en amour, as we used to say formerly.

    Jack Hinton Charles James Lever
British Dictionary definitions for au

au

abbreviation
1.
Australia

Au

Chemical symbol
1.
gold
Word Origin
from New Latin aurum

AU

abbreviation
1.
African Union
2.
Also a.u.. angstrom unit
3.
Also a.u.. astronomical unit
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 au

Au

chemical symbol for "gold," from Latin aurum "gold" (see aureate).

French, "at the, to the," from Old French al, contraction of a le, with -l- softened to -u-, as also poudre from pulverem, chaud from calidus, etc. Used in many expressions in cookery, etc., which have crossed the Channel since 18c., e.g. au contraire, literally "on the contrary;" au gratin, literally "with scrapings;" au jus, literally "with the juice."

Online Etymology Dictionary, © 2010 Douglas Harper
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au in Medicine

Au
The symbol for the element gold.

AU abbr.
Latin auris utraque (each ear)

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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au in Science
Au  
The symbol for gold.
AU  
Abbreviation of astronomical unit
gold
  (gōld)   
Symbol Au
A soft, shiny, yellow element that is the most malleable of all the metals. It occurs in veins and in alluvial deposits. Because it is very durable, resistant to corrosion, and a good conductor of heat and electricity, gold is used as a plated coating on electrical and mechanical components. It is also an international monetary standard and is used in jewelry and for decoration. Atomic number 79; atomic weight 196.967; melting point 1,063.0°C; boiling point 2,966.0°C; specific gravity 19.32; valence 1, 3. See Periodic Table. See Note at element.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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