equinoctial colure

That great circle of the celestial sphere through the celestial poles and equinoxes. The hour circle of the vernal equinox. It is an imaginary point among the stars where the sun apparently crosses the equator from south to north on or about March 20 through 23 of each year. Also called a vernal equinox or a spring equinox.

Aviation dictionary. 2014.

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  • Equinoctial colure — Equinoctial E qui*noc tial, a. [L. aequinoctials, fr. aequinoctium equinox: cf. F. [ e]quinoxial. See {Equinox}.] 1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • equinoctial colure — noun : the circle of 0 and 12 hours right ascension passing through the equinoctial points of the celestial sphere * * * equinoctial colure, the great circle passing through the poles and equinoctial points …   Useful english dictionary

  • Colure — Co*lure (k[ o]*l[=u]r ), n.; pl. {Colures} (k[ o]*l[=u]rz ). [F. colure, L. coluri, pl., fr. Gr. ko loyros dock tailed, a i ko loyroi (sc. grammai lines) the colures; fr. ko los docked, stunted + o yra tail. So named because a part is always… …   The Collaborative International Dictionary of English

  • Equinoctial — E qui*noc tial, a. [L. aequinoctials, fr. aequinoctium equinox: cf. F. [ e]quinoxial. See {Equinox}.] 1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line. [1913 Webster] 2. Pertaining to… …   The Collaborative International Dictionary of English

  • Equinoctial line — Equinoctial E qui*noc tial, a. [L. aequinoctials, fr. aequinoctium equinox: cf. F. [ e]quinoxial. See {Equinox}.] 1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • Equinoctial points — Equinoctial E qui*noc tial, a. [L. aequinoctials, fr. aequinoctium equinox: cf. F. [ e]quinoxial. See {Equinox}.] 1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • Equinoctial time — Equinoctial E qui*noc tial, a. [L. aequinoctials, fr. aequinoctium equinox: cf. F. [ e]quinoxial. See {Equinox}.] 1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line. [1913 Webster] 2.… …   The Collaborative International Dictionary of English

  • colure — [kō loor′, kəloor′; kō′loor΄] n. [< L coluri < Gr kolouroi, the colures, lit., dock tailed (ones), pl. of kolouros < kolos, docked (see HOLT) + oura, tail (see URO 2): the “tail” (i.e., the lower part) is cut off from view by the… …   English World dictionary

  • Colure — Orange = equinoctial colure Blue = solstitial colure G = e …   Wikipedia

  • colure —   n. celestial circle intersecting other at poles.    ♦ equinoctial colure, such circle passing through equinoctial points.    ♦ solstitial colure, such circle at right angles to equinoctial colure …   Dictionary of difficult words

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