sidereal的词源

英文词源

sidereal (adj.): also siderial, 1630s, "star-like;" 1640s, "of or pertaining to the stars," earlier sideral (1590s), from French sidereal (16c.), from Latin sidereus "starry, astral, of the constellations," from sidus (genitive sideris) "star, group of stars, constellation," probably from PIE root *sweid- "to shine" (cognates: Lithuanian svidus "shining, bright"). Sidereal time is measured by the apparent diurnal motion of the fixed stars. The sidereal day begins and ends with the passage of the vernal equinox over the meridian and is about four minutes shorter than the solar day, measured by the passage of the sun over the meridian.

来自法语 sidereal,恒星的，来自拉丁语 sideris,星星的，所有格形式于 sidus,星星，星辰，词源同 consider,desire.

该词的英语词源请访问找单词词源英文版：sidereal 词源，sidereal 含义。