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| 1. | [ noun ] (chemistry) 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 | |
| Synonyms: | gold atomic_number_79 | |
| Related terms: | noble_metal green_gold guinea_gold gold_dust gold gold_leaf sylvanite dental_gold gold_foil | |
| 2. | [ noun ] Last name, frequency rank in the U.S. is 11417 | |
| 3. | [ noun ] (astronomy) 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 | |
| Related terms: | astronomy_unit | |
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