What is the meaning of Tropic?
Either of the two parallels of latitude 23°26′ north and south of the equator; the farthest points at which the sun can be directly overhead; the boundaries of the torrid zone or tropics.
Of, or relating to the tropics; tropical.
Having the quality of indirectly inducing a biological or chemical change in a system or substrate.
Pertaining to, involving, or of the nature of a trope or tropes.
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