equator

equator
noun Etymology: Middle English, from Medieval Latin aequator, literally, equalizer, from Latin aequare Date: 14th century 1. the great circle of the celestial sphere whose plane is perpendicular to the axis of the earth 2. 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 3. a. a circle or circular band dividing the surface of a body into two usually equal and symmetrical parts b. equatorial plane <
the equator of a dividing cell
>
4. great circle

New Collegiate Dictionary. 2001.

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  • equator — /i kway teuhr/, n. 1. the great circle on a sphere or heavenly body whose plane is perpendicular to the axis, equidistant everywhere from the two poles of the sphere or heavenly body. 2. the great circle of the earth that is equidistant from the… …   Universalium

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