Толковый словарь английского языка Oxford English Reference - sidereal
Sidereal
sidereal
adj. of or concerning the constellations or fixed stars. Phrases and idioms sidereal clock a clock showing sidereal time. sidereal day the time between successive meridional transits of a star or esp. of the first point of Aries, about four minutes shorter than the solar day. sidereal time time measured by the apparent diurnal motion of the stars. sidereal year a year longer than the solar year by 20 minutes 23 seconds because of precession. Etymology: L sidereus f. sidus sideris star
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adjective Etymology: Latin sidereus, from sider-, sidus star, constellation Date: 1647 of, relating to, or expressed in relation to stars or constellations ; astral ...Толковый словарь английского языка
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