(astronomy) One day of sidereal time; the time in which Earth rotates once around its axis, relative to the point of the vernal equinox (about 23 hours, 56 minutes, 4 seconds).

(astrology) A form of astrology that measures the position of the sun relative to the stars. This compensates for the precession of Earth's axis, which causes the zodiac signs to move around the sky relative to the vernal equinox.

(astronomy) sidereal orbital period / (astronomy) sidereal rotation period

plural of sidereal period

plural of sidereal day

plural of sidereal month

The time in which the moon passes round the ecliptic to the same star: 27.3217 days.

(astronomy) The sidereal day of a planet. (I.e., in the definition for "sidereal day", replace "Earth" by the given planet.)

(astronomy) The sidereal year of a planet. (I.e., in the definition for "sidereal year", replace "Earth" by the given planet.)

plural of sidereal orbital period