plural tropics
plural tropics
Learner's definition of TROPIC
1
[singular] : either one of the two imaginary lines that circle the Earth to the north and south of the equator回归线 ◊ The Tropic of Cancer is 23¹/₂ degrees north of the equator and the Tropic of Capricorn is 23¹/₂ degrees south of the equator.北回归线位于北纬23.5°，南回归线位于南纬23.5°。
2
the tropics : the part of the world that is near the equator where the weather is very warm热带；热带地区