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the equator
Definition of the equator
: an imaginary circle around the middle of the Earth that is the same distance from the North Pole and the South Pole The city of Quito, Ecuador, lies very close to the equator.
From the M-W Editors
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equatorplay
: the great circle of the celestial sphere whose plane is perpendicular to the axis of the earth
: a great circle of the earth or a celestial body that is everywhere equally distant from the two poles and divides the surface into the northern and southern hemispheres
: a circle or circular band dividing the surface of a body into two usually equal and symmetrical parts
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