year
Sidereal 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. [1913 Webster]

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. [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. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • 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 year …   The Collaborative International Dictionary of English

  • year — /year/, n. 1. a period of 365 or 366 days, in the Gregorian calendar, divided into 12 calendar months, now reckoned as beginning Jan. 1 and ending Dec. 31 (calendar year or civil year). Cf. common year, leap year. 2. a period of approximately the …   Universalium

  • year — [jɪə, jɜː ǁ jɪr] written abbreviation yr noun [countable] 1. also calendar year the period of time beginning on January 1 and ending on December 31: • The Small Business Administration arranged 55,000 small business loans last year. 2 …   Financial and business terms

  • year — W1S1 [jıə, jə: US jır] n ▬▬▬▬▬▬▬ 1¦(12 months)¦ 2¦(january to december)¦ 3 years 4 all (the) year round 5 year by year 6 year after year/year in, year out 7¦(period of life/history)¦ 8 the school/academic year 9¦(s …   Dictionary of contemporary English

  • year — or sidereal year [yir] n. [ME yere < OE gear, akin to Ger jahr < IE * yēro , year, summer (> Gr hōros, time, year, OSlav jara, spring) < base * ei , to go (> L ire, to go): basic sense “that which passes”] 1. a) a period of 365… …   English World dictionary

  • YEAR — (Heb. שָׁנָה, shanah), the period during which the earth makes one complete revolution around the sun. This period corresponds roughly to 12 revolutions of the moon around the earth. The determination of the length of a year and its 12 parts for… …   Encyclopedia of Judaism

  • year — [ jır ] noun *** 1. ) count a period of 365 days, or 366 in a leap year, divided into 12 months: He lived in Paris for a few years. a ) used about a particular period of time, beginning on January 1 and ending on December 31, or between the first …   Usage of the words and phrases in modern English

  • year — (n.) O.E. gear (W.Saxon), ger (Anglian) year, from P.Gmc. *jæram year (Cf. O.S., O.H.G. jar, O.N. ar, Dan. aar, O.Fris. ger, Du. jaar, Ger. Jahr, Goth. jer year ), from PIE *yer o , from r …   Etymology dictionary

  • year — ► NOUN 1) the time taken by the earth to make one revolution around the sun. 2) (also calendar year) the period of 365 days (or 366 days in leap years) starting from the first of January, used for reckoning time in ordinary affairs. 3) a period… …   English terms dictionary

  • year — index annum Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • Year — A year (from Old English gēar) is the orbital period of the Earth moving around the Sun. For an observer on Earth, this corresponds to the period it takes the Sun to complete one course throughout the zodiac along the ecliptic. In astronomy, the… …   Wikipedia

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