| angstrom unit. |
| a unit of length, equal to the mean distance of the earth from the sun: approximately 93 million miles (150 million km). Abbreviation: AU |
| astronomical unit n. Abbr. AU A unit of length used in measuring astronomical distances within the solar system equal to the mean distance from Earth to the sun, approximately 150 million kilometers (93 million miles). |
| Au The symbol for the element gold. [From Latin aurum, gold.] |
| AU abbr. astronomical unit |
gold  (gōld)  n.
[Middle English, from Old English; see ghel-2 in Indo-European roots.] |
Au
The symbol for the element gold.
AU abbr.
Latin auris utraque (each ear)
| astronomical unit (ās'trə-nŏm'ĭ-kəl) Pronunciation Key
A unit of length equal to the average distance from Earth to the Sun, approximately 149.6 million km (92.8 million mi). It is used especially to measure distances within the solar system. Compare light-year, parsec. |
| Au
The symbol for gold. |
| AU
Abbreviation of astronomical unit |
| gold (gōld) Pronunciation Key
Symbol Au A soft, shiny, yellow element that is the most malleable of all the metals. It occurs in veins and in alluvial deposits. Because it is very durable, resistant to corrosion, and a good conductor of heat and electricity, gold is used as a plated coating on electrical and mechanical components. It is also an international monetary standard and is used in jewelry and for decoration. Atomic number 79; atomic weight 196.967; melting point 1,063.0°C; boiling point 2,966.0°C; specific gravity 19.32; valence 1, 3. See Periodic Table. See Note at element. |
au
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(1995-02-15)
| Au gold |
| AU astronomical unit |