Definition of Sidereal
1. Adjective. Of or relating to the stars or constellations. "The sidereal system"
2. Adjective. (of divisions of time) determined by daily motion of the stars. "Sidereal time"
Definition of Sidereal
1. a. Relating to the stars; starry; astral; as, sidereal astronomy.
Definition of Sidereal
1. pertaining to the stars [adj]
Medical Definition of Sidereal
1.
1. Relating to the stars; starry; astral; as, sidereal astronomy.
2. 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 sidereal revolution of a planet; a sidereal day. Sidereal clock, day, month, year. See Clock, Day, etc. Sideral time, time as reckoned by sideral days, or, taking the sidereal day as the unit, the time elapsed since a transit of the vernal equinox, reckoned in parts of a sidereal day. This is, strictly, apparent sidereal time, mean sidereal time being reckoned from the transit, not of the true, but of the mean, equinoctial point.
Origin: L. Sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire.
Source: Websters Dictionary
(01 Mar 1998)
Lexicographical Neighbors of Sidereal
Other Resources:
