sidereal day

NOUN
  1. the time for one complete rotation of the earth relative to a particular star, about 4 minutes shorter than a mean solar day
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How To Use sidereal day In A Sentence

  • A solar day is four minutes longers than a sidereal day.
  • A sidereal day is about 4 minutes shorter than a solar day.
  • This is the difference between what we call the sidereal day (the time that it takes to make one complete rotation) and the synodic day (the time that it takes to go from the Sun highest in the sky until the Sun is again at its highest in the sky). Astroprof's Page
  • The time which the earth occupies in making a complete rotation around this axis is called a sidereal day. The Story of the Heavens
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