GNU Collaborative International Dictionary of English

last match results

Found 2 definitions

1.       
   Sidereal , a. [L. sidereus, from sidus, sideris, a constellation, a star. Cf. Sideral, Consider, Desire.]
   Relating to the stars; starry; astral; as, sidereal astronomy.
   1913 Webster
   (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.
   1913 Webster
   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.
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2.       
   Year , n. [OE. yer, yeer, ȝer, AS. geár; akin to OFries. ir, gr, D. jaar, OHG. jār, G. jahr, Icel. ār, Dan. aar, Sw. år, Goth. jr, Gr.  a season of the year, springtime, a part of the day, an hour,  a year, Zend yāre year. √4, 279. Cf. Hour, Yore.]
   1913 Webster
   The time of the apparent revolution of the sun trough the ecliptic; the period occupied by the earth in making its revolution around the sun, called the astronomical year; also, a period more or less nearly agreeing with this, adopted by various nations as a measure of time, and called the civil year; as, the common lunar year of 354 days, still in use among the Mohammedans; the year of 360 days, etc. In common usage, the year consists of 365 days, and every fourth year (called bissextile, or leap year) of 366 days, a day being added to February on that year, on account of the excess above 365 days (see Bissextile).
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   Of twenty year of age he was, I guess.
   Chaucer.
   
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   ☞ The civil, or legal, year, in England, formerly commenced on the 25th of March. This practice continued throughout the British dominions till the year 1752.
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   The time in which any planet completes a revolution about the sun; as, the year of Jupiter or of Saturn.
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   pl. Age, or old age; as, a man in years.
   Shak.
   
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   Anomalistic year, the time of the earth's revolution from perihelion to perihelion again, which is 365 days, 6 hours, 13 minutes, and 48 seconds. -- A year's mind (Eccl.), a commemoration of a deceased person, as by a Mass, a year after his death. Cf. A month's mind, under Month. -- Bissextile year. See Bissextile. -- Canicular year. See under Canicular. -- Civil year, the year adopted by any nation for the computation of time. -- Common lunar year, the period of 12 lunar months, or 354 days. -- Common year, each year of 365 days, as distinguished from leap year. -- Embolismic year, or Intercalary lunar year, the period of 13 lunar months, or 384 days. -- Fiscal year (Com.), the year by which accounts are reckoned, or the year between one annual time of settlement, or balancing of accounts, and another. -- Great year. See Platonic year, under Platonic. -- Gregorian year, Julian year. See under Gregorian, and Julian. -- Leap year. See Leap year, in the Vocabulary. -- Lunar astronomical year, the period of 12 lunar synodical months, or 354 days, 8 hours, 48 minutes, 36 seconds. -- Lunisolar year. See under Lunisolar. -- Periodical year. See Anomalistic year, above. -- Platonic year, Sabbatical year. See under Platonic, and Sabbatical. -- Sidereal year, the time in which the sun, departing from any fixed star, returns to the same. This is 365 days, 6 hours, 9 minutes, and 9.3 seconds. -- Tropical year. See under Tropical. -- Year and a day (O. Eng. Law), a time to be allowed for an act or an event, in order that an entire year might be secured beyond all question. Abbott. -- Year of grace, any year of the Christian era; Anno Domini; A. D. or a. d.
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