Definition for SID'ER-AL, or SI-DE'RE-AL

SID'ER-AL, or SI-DE'RE-AL, a. [L. sideralis, from sidus, a star.]

  1. Pertaining to a star or stars; astral; as, sideral light.
  2. Containing stars; starry; as, sidereal regions. Sidereal year, in astronomy, the period in which the fixed stars apparently complete a revolution and come to the same point in the heavens.

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