赤道は英語で
equator

英語の定義

赤道
1. n. (geography) equator

equator
1. n. (geography, 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.
2. n. (astronomy) A similar great circle on any sphere, especially on a celestial body, or on other reasonably symmetrical three-dimensional body.
3. n. The midline of any generally spherical object, such as a fruit or vegetable, that has identifiable poles.
Slice the onion through the equator.
4. n. The celestial equator.

equatorial
1. adj. of, near, or relating to the equator
That plant is best suited to equatorial climates.
2. adj. (organic chemistry) perpendicular to the plane of a ring
3. n. (astronomy) A kind of telescope mounted so as to have two axes of motion at right angles to each other, one of them parallel to the axis of the Earth, and each carrying a graduated circle, one for mea