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Definition of tropic
tropic - adj. of weather or climate; hot and humid as in the tropics; relating to or situated in or characteristic of the tropics (the region on either side of the equator); noun either of two parallels of latitude about 23.5 degrees north and south of the equator representing the points farthest north and south at which the sun can shine directly overhead and constituting the boundaries of the Torrid Zone or tropics.
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