equators

(often “the Equator”) An imaginary great circle around the Earth, equidistant from the two poles, and dividing earth's surface into the northern and southern hemisphere.

A similar great circle on any sphere, especially on a celestial body, or on other reasonably symmetrical three-dimensional body.

The midline of any generally spherical object, such as a fruit or vegetable, that has identifiable poles.

“Slice the onion through the equator.”

The celestial equator.