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sidereal
01
(of divisions of time) determined by daily motion of the stars
02
relating to the stars or constellations, especially in terms of their positions relative to Earth
sidereal
adj
Example
Sidereal astrology uses the positions of stars and constellations for horoscopic purposes.
Sidereal charts plot the positions of celestial objects against the background of distant stars.
Sidereal measurements and calculations are based on the fixed positions of stars and constellations in the night sky.
