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Either of two parallels of latitude on the earth, one 23°27ʹ north of the equator and the other 23°27ʹ 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.
(noun)
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The region of the earth's surface lying between these latitudes.
(noun)
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Astronomy Either of two corresponding parallels of celestial latitude that are the limits of the apparent northern and southern passages of the sun.
(noun)
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Of or relating to the Tropics; tropical.
(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.