tropic1trop·ic 1 (tr?p??k)n.1. Either of two parallels of latitude on the earth, one 23°26? north of the equator and the other 23°26? 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 tropics.2. Astronomy Either of two corresponding parallels of celestial latitude that are the limits of the apparent northern and southern passages of the sun.adj. Of or relating to the tropics; tropical.[Middle English tropik, from Old French tropique, from Late Latin tropicus, from Latin, of a turn, from Greek tropikos, from trop?, a turning; see trep- in Indo-European roots.]tro·pic 2 (tr??p?k)adj. Relating to or exhibiting tropism.[From -tropic.]tro?pi·cal·ly adv.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.tropic (?tr?p?k) n1. (Physical Geography) (sometimes capital) either of the parallel lines of latitude at about 23°N (tropic of Cancer) and 23°S (tropic of Capricorn) of the equator2. (Physical Geography) the tropics (often capital) that part of the earth’s surface between the tropics of Cancer and Capricorn; the Torrid Zone3. (Astronomy) astronomy either of the two parallel circles on the celestial sphere having the same latitudes and names as the corresponding lines on the earthadj (Physical Geography) a less common word for tropical[C14: from Late Latin tropicus belonging to a turn, from Greek tropikos, from tropos a turn; from the ancient belief that the sun turned back at the solstices]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014trop?ic (?tr?p ?k) n. 1. a. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. b. the tropics, the regions lying between and near these parallels of latitude; the Torrid Zone and neighboring regions. 2. either of two circles on the celestial sphere, one lying in the same plane as the tropic of Cancer, the other in the same plane as the tropic of Capricorn. adj. 3. of or pertaining to the tropics; tropical. [1350?1400; Middle English
-tropic
-tropicsuff.1. Turning or changing in a specified way or in response to a specified stimulus: heliotropic.2. Affecting or attracted to something specified: psychotropic.[From Greek trop?, a turning; see tropic.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.-tropic adj combining form (Biology) turning or developing in response to a certain stimulus: heliotropic. [from Greek tropos a turn; see trope]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014trop?ic (?tr?p ?k) n. 1. a. either of two corresponding parallels of latitude on the terrestrial globe, one (tropic of Cancer) about 23½° N, and the other (tropic of Capricorn) about 23½° S of the equator, being the boundaries of the Torrid Zone. b. the tropics, the regions lying between and near these parallels of latitude; the Torrid Zone and neighboring regions. 2. either of two circles on the celestial sphere, one lying in the same plane as the tropic of Cancer, the other in the same plane as the tropic of Capricorn. adj. 3. of or pertaining to the tropics; tropical. [1350?1400; Middle English