Equinoctial
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.

Synonyms:

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

  • equinoctial — ► ADJECTIVE 1) relating to or at the time of the equinox. 2) at or near the equator …   English terms dictionary

  • equinoctial — [ē΄kwi näk′shəl] adj. [ME & OFr equinoxial < L aequinoctialis] 1. relating to either of the equinoxes or to equal periods of day and night 2. occurring at or about the time of an equinox 3. equatorial n. 1. CELESTIAL EQUATOR 2 …   English World dictionary

  • equinoctial — adj. & n. adj. 1 happening at or near the time of an equinox (equinoctial gales). 2 of or relating to equal day and night. 3 at or near the (terrestrial) equator. n. (in full equinoctial line) = celestial equator. Phrases and idioms: equinoctial… …   Useful english dictionary

  • equinoctial — 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 — I. adjective Date: 1545 1. relating to an equinox or to a state or the time of equal day and night 2. relating to the regions or climate on or near the equator 3. relating to the time when the sun passes an equinoctial point II. noun Date: 1521 1 …   New Collegiate Dictionary

  • equinoctial — I. n. Celestial equator, equinoctial line. II. a. 1. Of the equinoctial. 2. At the time of the equinoxes …   New dictionary of synonyms

  • equinoctial — /ikwəˈnɒkʃəl/ (say eekwuh nokshuhl), /ɛ / (say e ) adjective 1. relating to an equinox or the equinoxes, or to the equality of day and night. 2. relating to the celestial equator. 3. occurring at or about the time of an equinox: an equinoctial… …   Australian English dictionary

  • equinoctial — /ee kweuh nok sheuhl, ek weuh /, adj. 1. pertaining to an equinox or the equinoxes, or to the equality of day and night. 2. pertaining to the celestial equator. 3. occurring at or about the time of an equinox. 4. Bot. (of a flower) opening… …   Universalium

  • equinoctial — [ˌi:kwɪ nɒkʃ(ə)l, ˌɛkwɪ ] adjective 1》 relating to or at the time of the equinox. 2》 at or near the equator. noun (also equinoctial line) another term for celestial equator …   English new terms dictionary

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