Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun sidereal_day

1 sense of sidereal day

Sense 1
sidereal day, day -- (the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day)
       => time unit, unit of time -- (a unit for measuring time periods)
       => sidereal time -- (measured by the diurnal motion of stars)