| NOUN | substance | Au, gold, atomic number 79 | a soft yellow malleable ductile (trivalent and univalent) metallic element |
|---|---|---|---|
| quantity | AU, Astronomical Unit | a unit of length used for distances within the solar system |
| Sounds | ow' | |
|---|---|---|
| Meaning | 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 | |
| Narrower | 24-karat gold, pure gold | 100 per cent gold |
| gold dust | The particles and flakes (and sometimes small nuggets) of gold obtained in placer mining | |
| green gold | A gold alloy (at least 14 karat gold with silver or silver and cadmium) that has a green appearance | |
| guinea gold | 22-karat gold from which guinea coins were made | |
| Broader | noble metal | Any metal that is resistant to corrosion or oxidation |
| Substance of | dental gold | An alloy of gold used in dentistry |
| gold | coins made of gold | |
| gold foil | foil made of gold | |
| gold leaf | A very thin form of gold foil | |
| sylvanite, graphic tellurium | A silver-white mineral consisting of silver gold telluride | |
| Spanish | número atómico 79, oro | |
| Catalan | número atòmic 79, or | |
| Meaning | 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). | |
|---|---|---|
| Synonym | Astronomical Unit | |
| Broader | astronomy unit | A linear unit used for astronomical distances |
| Spanish | UA, unidad astronómica | |
| Catalan | UA, unitat astronòmica | |
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