Au (Noun)
Meaning 1
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.
Classification
Nouns denoting substances.
Synonyms
Hypernyms
Hyponyms
Meaning 2
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).
Classification
Nouns denoting quantities and units of measure.