AU
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Au
The symbol for gold.
[From Latin aurum, gold.]
AU
abbr.
astronomical unit
au
the internet domain name for
(Computer Science) Australia
Au
the chemical symbol for
(Elements & Compounds) gold
[from New Latin aurum]
AU
abbreviation for
1. (Placename) African Union
2. (General Physics) Also: a.u. angstrom unit
3. (Astronomy) Also: a.u. astronomical unit
AU
astronomical unit.
Au
1. Also,
au.
author. 2. Chem. Symbol. gold.
[< Latin aurum]
A.U.
or a.u.,
angstrom unit.
Au
The symbol for gold.
AU
Abbreviation of astronomical unit
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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 regiagold 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 24-karat gold, pure gold - 100 per cent gold 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 graphic tellurium, sylvanite - a silver-white mineral consisting of silver gold telluride; a source of gold in Australia and America |
| 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 |