n.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 two hemispheres.
2.(Astron.) 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.
Equator of the sun
(Astron.) the great circle whose plane passes through through the center of the body, and is perpendicular to its axis of revolution.
Magnetic equator
See Aclinic.
Noun1.equator - an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles; "the equator is the boundary between the northern and southern hemispheres"
2.equator - a circle dividing a sphere or other surface into two usually equal and symmetrical parts
Antarctic Zone, Arctic Circle, Arctic Zone, Frigid Zones, Torrid Zone, Tropic of Cancer, Tropic of Capricorn, Variable Zones, anklet, aphelion, apogee, armlet, astronomical longitude, autumnal equinox, band, belt, bisector, boundary, bracelet, celestial equator, celestial longitude, celestial meridian, center, cincture, cingulum, circle, climate, clime, collar, collarband, colures, core, diameter, diaphragm, divider, earring, ecliptic, equinoctial, equinoctial circle, equinoctial colure, equinox, fascia, fillet, finger ring, furnace, galactic longitude, geocentric longitude, geodetic longitude, girdle, girt, girth, great circle, halfway mark, heart, heliocentric longitude, hell, hoop, horse latitudes, inferno, interior, kernel, latitude, line of demarcation, longitude, longitude in arc, mean, median, meridian, middle, midmost, midriff, midst, neckband, necklace, nose ring, nucleus, orbit, oven, parallel, partition, perigee, perihelion, period, prime meridian, quoit, ring, roaring forties, small circle, solstitial colure, steam bath, subtropics, the line, thick, thick of things, trajectory, tropic, tropics, vernal equinox, waist, waistline, wristband, wristlet, zodiac, zone
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Equating for curves
Equating for grades
Equation box
Equation clock
Equation of a curve
Equation of condition
Equation of equinoxes
Equation of payments
Equation of the center
Equation of time
equational logic
Equations of condition
-- Equator --
Equator of the sun
equatorial current
Equatorial Guinea
Equatorial Guinea monetary unit
Equatorial telescope
equestrian sport
Equetus lanceolatus
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