Noun
auride (plural aurides)
(inorganic chemistry) Any anion of gold; any salt containing such an anion.
A stoichiometric mixture of caesium and gold will react to form yellow caesium auride (Cs + Au − ) upon heating. Source: Internet
Gold has the highest Pauling electronegativity of any metal, with a value of 2.54, making the auride anion relatively stable. Source: Internet