| equinoctial | 1. Pertaining to an equinox, or the equinoxes, or to the time of equal day and night; as, the equinoctial line. 2. Pertaining to the regions or climate of the equinoctial line or equator; in or near that line; as, equinoctial heat; an equinoctial sun. 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. <astronomy> Equinoctial colure, 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. "Thrice the equinoctial line He circled. <astronomy>" (Milton) - Equinoctial points reckoned in any year from the instant when the mean sun is at the mean vernal equinoctial point. Origin: L. Aequinoctials, fr. Aequinoctium equinox: cf. F. Equinoxial. See Equinox. Source: Websters Dictionary (01 Mar 1998) |
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| equinoctial | the great circle on the celestial sphere midway between the celestial poles |
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| equinoctial | relating to an equinox (when the lengths or night and day are equal) |
| equinoctial | relating to the vicinity of the equator |
| equinoctial | the great circle on the celestial sphere midway between the celestial poles |
| equinoctial | the great circle on the celestial sphere midway between the celestial poles |
| equinoctial | (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic |
| equinoctial | a violent rainstorm near the time of an equinox |
| equinoctial | the time for the earth to make one revolution around the sun, measured between two vernal equinoxes |
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