sidereal
31sidereal day — The period between two successive transits of a particular meridian on the earth by the first point of Aries or successive transits of the vernal equinox. Because the first point of Aries is not fixed in space and it precesses along the… …
32sidereal hour — noun 1/24 of a sidereal day • Hypernyms: ↑hour, ↑hr, ↑60 minutes, ↑sidereal time * * * noun : the twenty fourth part of a sidereal day …
33Sidereal clock — Clock Clock (kl[o^]k), n. [AS. clucge bell; akin to D. klok clock, bell, G. glocke, Dan. klokke, Sw. klocka, Icel. klukka bell, LL. clocca, cloca (whence F. cloche); al perh. of Celtic origin; cf. Ir. & Gael. clog bell, clock, W. cloch bell. Cf.… …
34Sidereal hour — Hour Hour, n. [OE. hour, our, hore, ure, OF. hore, ore, ure, F. heure, L. hora, fr. Gr. ?, orig., a definite space of time, fixed by natural laws; hence, a season, the time of the day, an hour. See {Year}, and cf. {Horologe}, {Horoscope}.] 1. The …
35Sidereal time — Time Time, n.; pl. {Times}. [OE. time, AS. t[=i]ma, akin to t[=i]d time, and to Icel. t[=i]mi, Dan. time an hour, Sw. timme. [root]58. See {Tide}, n.] 1. Duration, considered independently of any system of measurement or any employment of terms… …
36Sidereal year — Year Year, n. [OE. yer, yeer, [yogh]er, AS. ge[ a]r; akin to OFries. i?r, g?r, D. jaar, OHG. j[=a]r, G. jahr, Icel. [=a]r, Dan. aar, Sw. [*a]r, Goth. j?r, Gr. ? a season of the year, springtime, a part of the day, an hour, ? a year, Zend y[=a]re… …
37sidereal hour — noun Date: circa 1695 the 24th part of a sidereal day …
38sidereal minute — noun Date: circa 1909 the 60th part of a sidereal hour …
39sidereal second — noun Date: circa 1909 the 60th part of a sidereal minute …
40sidereal time — noun Date: 1764 1. time based on the sidereal day 2. the hour angle of the vernal equinox at a place …