Sidereal clock, day, month, year. See under 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.

(Si*de"re*al*ize) v. t. To elevate to the stars, or to the region of the stars; to etherealize.

German literature transformed, siderealized, as we see it in Goethe, reckons Winckelmann among its initiators.
W. Pater.

(Side"piece`) n. (Joinery) The jamb, or cheek, of an opening in a wall, as of door or window.

(Sid"er) n. One who takes a side.

(Si"der) n. Cider. [Obs.]

(Sid"er*al) a. [L. sideralis. See Sidereal.]

1. Relating to the stars.

2. (Astrol.) Affecting unfavorably by the supposed influence of the stars; baleful. "Sideral blast." Milton.

(Sid"er*a`ted) a. [L. sideratus, p. p. of siderari to be blasted by a constellation, fr. sidus, sideris, a constellation.] Planet-struck; blasted. [Obs.]

(Sid`er*a"tion), n. [L. sideratio.] The state of being siderated, or planet-struck; esp., blast in plants; also, a sudden and apparently causeless stroke of disease, as in apoplexy or paralysis. [Obs.] Ray.

(Si*de"re*al) a. [L. sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire.]

1. Relating to the stars; starry; astral; as, sidereal astronomy.

2. (Astron.) 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.

  By PanEris using Melati.

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