au
NounWordNet 3.0
Noun (2)
- 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 regiaSynonyms: goldAuatomic number 79
- 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)Synonyms: Astronomical UnitAU
Webster's Dictionary (GCIDE)
au \a.u.\ n.
1.(Astron.) the unit of length equal to the mean distance of the Earth from the sun, about 93 million miles (150 million kiometers); -- used almost exclusively in astronomy, or to describe astronomical distances.
Syn: astronomical unit, AU, A.U. [WordNet 1.5]
Free On-line Dictionary of Computing
au
1.<networking> The two character country code for Australia used in Internet domain names.
2.<filename extension> audio.
(1995-02-15)