- determined by or from the stars: sidereal time.
- of or relating to the stars.
Origin of sidereal
Examples from the Web for sidereal
And that one should consider the sidereal system and the maxims of Epictetus and be comforted.Strictly Business
These sidereal time-keepers mark the centuries and eras of other worlds for you.
So the constitution of the sidereal universe is just like that of the bodies which we call material.
Not only nebul are probably unstable, but also many of the sidereal systems.The Asteroids
See, for example, the January number, 1876: Sidereal Astronomy.Mysterious Psychic Forces
- of, relating to, or involving the stars
- determined with reference to one or more starsthe sidereal day
Word Origin and History for sidereal
also siderial, 1630s, "star-like;" 1640s, "of or pertaining to the stars," earlier sideral (1590s), from French sidereal (16c.), from Latin sidereus "starry, astral, of the constellations," from sidus (genitive sideris) "star, group of stars, constellation," probably from PIE root *sweid- "to shine" (cf. Lithuanian svidus "shining, bright"). Sidereal time is measured by the apparent diurnal motion of the fixed stars. The sidereal day begins and ends with the passage of the vernal equinox over the meridian and is about four minutes shorter than the solar day, measured by the passage of the sun over the meridian.
- Relating to the stars or constellations.
- Measured with respect to the background of fixed stars instead of the Sun.