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The symbol for gold.
[From Latin aurum, gold.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
the internet domain name for
(Computer Science) Australia
the chemical symbol for
(Elements & Compounds) gold
[from New Latin aurum]
1. (Placename) African Union
2. (General Physics) Also: a.u. angstrom unit
3. (Astronomy) Also: a.u. astronomical unit
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
2. Chem. Symbol. gold.
[< Latin aurum]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
The symbol for gold.
Abbreviation of astronomical unit
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||Au - a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia|
gold foil - foil made of gold
gold leaf - a very thin form of gold foil
gold - coins made of gold
noble metal - any metal that is resistant to corrosion or oxidation
gold dust - the particles and flakes (and sometimes small nuggets) of gold obtained in placer mining
dental gold - an alloy of gold used in dentistry
green gold - a gold alloy (at least 14 karat gold with silver or silver and cadmium) that has a green appearance
guinea gold - 22-karat gold from which guinea coins were made
|2.||AU - a unit of length used for distances within the solar system; equal to the mean distance between the Earth and the Sun (approximately 93 million miles or 150 million kilometers)|
astronomy unit - a linear unit used for astronomical distances
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