Sidereal meaning

sī-dîr'ē-əl
Of, relating to, or concerned with the stars or constellations; stellar.
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Measured or determined by means of the apparent daily motion of the stars.

Sidereal time.

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Of or pertaining to the stars.
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Expressed in reference to the stars.
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Relating to the stars or constellations.
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Measured with respect to the background of fixed stars instead of the Sun.
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Of or relating to the stars.
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(astronomy) Relating to a measurement of time relative to the position of the stars.
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(astronomy) Relating to a measurement of time relative to the point of the vernal equinox.
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Origin of sidereal

  • From Latin sīdereus from sīdus sīder- constellation, star
    From American Heritage Dictionary of the English Language, 5th Edition
  • Latin sidereus, from sidus, sider-, star
    From Wiktionary