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

   types:

   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