ETYM Latin sidereus, from sidus, sideris, a constellation, a star. Related to Sideral, Consider, Desire.
1. Of or relating to the stars or constellations.
2. (Of divisions of time) Determined by daily motion of the stars.
3. Pertaining or according to stars; measured by stellar motion.
4. Of or relating to the stars.
auf das System der Fixsterne bezüglich.