1A line notionally drawn on the earth equidistant from the poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°.
More example sentences
- UV intensity falls as one moves from the equator toward Earth's poles, increasing latitude.
- As of 1791, the meter was defined as one ten-millionth the distance from the North Pole to the equator along the line of longitude that passes through Paris.
- This influx of fresh water causes the Gulf Stream, the ocean current that carries warm water from the equator into the northern hemisphere, to stop.
late Middle English: from medieval Latin aequator, in the phrase circulus aequator diei et noctis 'circle equalizing day and night', from Latin aequare 'make equal' (see equate).
Definition of equator in:
- The US English dictionary