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Au / AU > 2 senses
NOUN1Au, gold, atomic number 79A soft yellow malleable ductile (trivalent and univalent) metallic element
2AU, Astronomical UnitA unit of length used for distances within the solar system
Au / AU > pronunciation
Soundsow'
Au > noun 1, substance
MeaningA 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.
Synonymsgold, atomic number 79
Substance ofgold foil; gold leaf; gold; dental gold; sylvanite, graphic tellurium
Broadernoble metal
Narrower24-karat gold, pure gold; gold dust; green gold; guinea gold
AU > noun 2, quantity
MeaningA 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).
SynonymsAstronomical Unit
Broaderastronomy unit

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