Synonyms: Astronomical Unit, AU
Definition: 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)
Similar words: astronomy unit
Definition: a linear unit used for astronomical distances
Synonyms: atomic number 79, Au, gold
Definition: 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
Similar words: noble metal
Definition: any metal that is resistant to corrosion or oxidation