a.u. October 20, 2005

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. See wordnet

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 steal compass, drive north, disappear...