sidereal

Meanings

1. 1
   adj

   (of divisions of time) determined by daily motion of the stars

   Sidereal time.

2. 2
   adj

   of or relating to the stars or constellations

   Sidereal bodies.

3. 3
   adj

   Of or relating to the stars.

   These fringes of lamplight, struggling up through smoke and thousandfold exhalation, some fathoms into the ancient reign of Night, what thinks Boötes of them, as he leads his Hunting-Dogs over the Zenith in their leash of sidereal fire?

4. 4
   adj

   Relating to a measurement of time relative to the position of the stars.

   Then, from a sufficient number of observations of synodic periods to give their mean, we obtain the sidereal period, or period with reference to the stars.

From Latin sīdereus + -al (cf. Latin sīderālis), from sīdus (“star, constellation”), of unknown ultimate origin, likely a substrate language such as Pre-Greek.

Topics