equator

equator
/ɪˈkweɪtə(r); ɪ`kwetɚ/ n
imaginary line (or one drawn on a map, etc) around the earth at an equal distance from the North and South Poles 赤道
    It is very hot near the equator. 赤道附近非常热. =>illus at globe 见globe之插图.

牛津英汉双解词典