Noun | 1. | ![]() Synonyms: atomic number 79, gold |
2. | AU - 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 Unit |
1. | (networking) | au - The two character country code for Australia used in Internet domain names. | |
2. | (filename extension) | au - audio. |