sidereal Meaning, Definition & Usage
adjective of or relating to the stars or constellations
- sidereal bodies
- the sidereal system
adjective (of divisions of time) determined by daily motion of the stars
- sidereal time
Relating to the stars; starry; astral; as,. siderealastronomy
(Astron.) Measuring by the apparent motion of the stars; designated, marked out, or accompanied, by a return to the same position in respect to the stars; as, the siderealrevolution of a planet; a siderealday.