赤道

(1)a circle dividing a sphere or other surface into two usually equal and symmetrical parts

(2)球、または他の面を、通常均等で対称な2つの部分に分ける円

(3)an imaginary line around the Earth forming the great circle that is equidistant from the north and south poles; "the equator is the boundary between the northern and southern hemispheres"

(4)地球の南極と北極から等距離の所で大きな円を描く想像上の線

(5)a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it

(6)取り付けが2本の運動軸のみを有する、1つが地球の軸と平行、およびもう片方がそれに直角である望遠鏡