| NOUN | quantity | arcsecond, second | a 60th part of a minute of arc |
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| Meaning | A 60th part of a minute of arc. | |
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| Synonym | second | |
| Part of | minute, arcminute, minute of arc | A unit of angular distance equal to a 60th of a degree |
| Broader | angular unit | A unit of measurement for angles |
| Spanish | segundo de arco, segundo | |
| Catalan | segon | |
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