Reference meaning
Au
Last updated
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
Related source terms
goldatomic number 79
Other meanings
2. noun
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)
Source and scope
This definition is reproduced from Princeton WordNet 3.0, sense 14638799-n, under the WordNet 3.0 License. It has not yet received VocabularyBase editorial review. Read the source and license details.