名詞 equator:

1. an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles
2. a circle dividing a sphere or other surface into two usually equal and symmetrical parts

1. Relating to or being latitudes nearest to the equator.
   (緯度)低的緯度接近赤道的，或與之有關的
2. The angular distance north or south of the earth's equator, measured in degrees along a meridian, as on a map or globe.
   緯度地球赤道北或南的角距離，例如在地圖或地球儀上沿著子午線用度數(shù)測量
3. Singapore is near the equator.
   新加坡位于赤道附近。

e.qua.tor

n.（名詞）

The imaginary great circle around the earth`s surface, equidistant from the poles and perpendicular to the earth`s axis of rotation. It divides the earth into the Northern Hemisphere and the Southern Hemisphere.
赤道：地球赤道想象中環(huán)繞地球表面的大圓，距南北兩極距離相等，與地軸垂直， 它將地球分為北半球和南半球
A similar great circle drawn on the surface of a celestial body at right angles to the axis of rotation.
天球赤道：在天體表面與自轉軸成直角的大圓
The celestial equator.
天球赤道
A circle that divides a sphere or other surface into congruent parts.
中緯線：將球體或其他球面分成相導兩部分的圓

來源：
Middle English
中古英語
from Medieval Latin aequ3tor (diôo et noctis) [equalizer (of day and night)]
源自 中世紀拉丁語 aequ3tor (diôo et noctis) [使（日和夜）相等]
from aequ3re [to equalize] * see equate
源自 aequ3re [使相等] *參見 equate