au
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Au,
symbol for the element goldgold,metallic chemical element; symbol Au [Lat. aurum=shining dawn]; at. no. 79; at. wt. 196.96657; m.p. 1,064.43°C;; b.p. 2,808°C;; sp. gr. 19.32 at 20°C;; valence +1 or +3.
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AU
orau
Abbrev. for astronomical unit.Au
(chemistry)
AU
(astronomy)
au
(networking)The two character country code for Australia
used in Internet domain names.