au

English Dictionary -> Letter A -> au

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au Definition

• (n) 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
• (n) 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)

au Synonyms

• Astronomical Unit
• atomic number 79
• AU
• gold