sidereal hour
English Thesaurus
1. 1/24 of a sidereal day (noun.time)
| hypernym | : | sidereal time, |
| definition | : | measured by the diurnal motion of stars (noun.time) |
| hypernym | : | 60 minutes, hour, hr, |
| definition | : | a period of time equal to 1/24th of a day (noun.time) |
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