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. Pertaining to the regions or climate of the equinoctial line or equator; in or near that line; as, equinoctial heat; an equinoctial sun. [1913 Webster]

3. Pertaining to the time when the sun enters the equinoctial points; as, an equinoctial gale or storm, that is, one happening at or near the time of the equinox, in any part of the world. [1913 Webster]

{Equinoctial colure} (Astron.), the meridian passing through the equinoctial points.

{Equinoctial line} (Astron.), the celestial equator; -- so called because when the sun is on it, the nights and days are of equal length in all parts of the world. See {Equator}. [1913 Webster]

Thrice the equinoctial line He circled. --Milton.

{Equinoctial points} (Astron.), the two points where the celestial and ecliptic intersect each other; the one being in the first point of Aries, the other in the first point of Libra.

{Equinoctial time} (Astron.) reckoned in any year from the instant when the mean sun is at the mean vernal equinoctial point. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • equinoctial line — noun the great circle on the celestial sphere midway between the celestial poles • Syn: ↑celestial equator, ↑equinoctial circle, ↑equinoctial • Derivationally related forms: ↑equinoctial (for: ↑equinoctial) …   Useful english dictionary

  • equinoctial line — Equator E*qua tor, n. [L. aequator one who equalizes: cf. F. [ e]quateur equator. See {Equate}.] 1. (Geog.) The imaginary great circle on the earth s surface, everywhere equally distant from the two poles, and dividing the earth s surface into… …   The Collaborative International Dictionary of English

  • equinoctial line — /ˌikwənɒkʃəl ˈlaɪn/ (say .eekwuhnokshuhl luyn) noun the celestial equator. Also, equinoctial circle …   Australian English dictionary

  • equinoctial line. — See celestial equator. [1350 1400; ME] * * * …   Universalium

  • equinoctial line. — See celestial equator. [1350 1400; ME] …   Useful english dictionary

  • 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 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 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

  • Equinoctial — E qui*noc tial, n. The equinoctial line. [1913 Webster] …   The Collaborative International Dictionary of English

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