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Au

Definitions of Au
  1. noun
    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
    synonyms: atomic number 79, gold
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    types:
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    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
    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
    type of:
    noble metal
    any metal that is resistant to corrosion or oxidation
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