Definition of equator

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Equator (n.) The great circle of the celestial sphere, coincident with the plane of the earth's equator; -- so called because when the sun is in it, the days and nights are of equal length; hence called also the equinoctial, and on maps, globes, etc., the equinoctial line..

Lern More About Equator

Girdle :: Girdle (n.) The zodiac; also, the equator..
Southing :: Southing (n.) Distance of any heavenly body south of the equator; south declination; south latitude.
Serpentarius :: Serpentarius (n.) A constellation on the equator, lying between Scorpio and Hercules; -- called also Ophiuchus..
Equatorial :: Equatorial (n.) An instrument consisting of a telescope so mounted as to have two axes of motion at right angles to each other, one of them parallel to the axis of the earth, and each carrying a graduated circle, the one for measuring declination, and the other right ascension, or the hour angle, so that the telescope may be directed, even in the daytime, to any star or other object whose right ascension and declination are known. The motion in right ascension is sometimes communicated by clockw
Low :: Low (superl.) Near, or not very distant from, the equator; as, in the low northern latitudes..
Low :: Low (adv.) In a path near the equator, so that the declination is small, or near the horizon, so that the altitude is small; -- said of the heavenly bodies with reference to the diurnal revolution; as, the moon runs low, that is, is comparatively near the horizon when on or near the meridian..
Gunter''s Quadrant :: Gunter's quadrant () A thin quadrant, made of brass, wood, etc., showing a stereographic projection on the plane of the equator. By it are found the hour of the day, the sun's azimuth, the altitude of objects in degrees, etc. See Gunter's scale..
Climate :: Climate (v. i.) One of thirty regions or zones, parallel to the equator, into which the surface of the earth from the equator to the pole was divided, according to the successive increase of the length of the midsummer day..
Delphinus :: Delphinus (n.) The Dolphin, a constellation near the equator and east of Aquila..
Inclinnation :: Inclinnation (n.) The angle made by two lines or planes; as, the inclination of the plane of the earth's equator to the plane of the ecliptic is about 23¡ 28'; the inclination of two rays of light..
Equant :: Equant (n.) A circle around whose circumference a planet or the center of ann epicycle was conceived to move uniformly; -- called also eccentric equator.
Antoecians :: Antoecians (n. pl) Those who live under the same meridian, but on opposite parallels of latitude, north and south of the equator..
Declination :: Declination (n.) The angular distance of any object from the celestial equator, either northward or southward..
Plane :: Plane (a.) An ideal surface, conceived as coinciding with, or containing, some designated astronomical line, circle, or other curve; as, the plane of an orbit; the plane of the ecliptic, or of the equator..
Equatorial :: Equatorial (a.) Of or pertaining to the equator; as, equatorial climates; also, pertaining to an equatorial instrument..
Ecliptic :: Ecliptic (a.) A great circle drawn on a terrestrial globe, making an angle of 23¡ 28' with the equator; -- used for illustrating and solving astronomical problems..
Sextans :: Sextans (n.) A constellation on the equator south of Leo; the Sextant.
Sphere :: Sphere (n.) The apparent surface of the heavens, which is assumed to be spherical and everywhere equally distant, in which the heavenly bodies appear to have their places, and on which the various astronomical circles, as of right ascension and declination, the equator, ecliptic, etc., are conceived to be drawn; an ideal geometrical sphere, with the astronomical and geographical circles in their proper positions on it..
Rossel Current :: Rossel current () A portion of the southern equatorial current flowing westward from the Fiji Islands to New Guinea.
Doldrums :: Doldrums (n. pl.) A part of the ocean near the equator, abounding in calms, squalls, and light, baffling winds, which sometimes prevent all progress for weeks; -- so called by sailors..
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