- (n.) One of the two small circles of the celestial sphere, situated on each side of the equator, at a distance of 23ยก 28/, and parallel to it, which the sun just reaches at its greatest declination north or south, and from which it turns again toward the equator, the northern circle being called the Tropic of Cancer, and the southern the Tropic of Capricorn, from the names of the two signs at which they touch the ecliptic.
- (n.) The region lying between these parallels of latitude or near them on either side.
- (a.) Of or pertaining to the tropics; tropical.
- (a.) Of, pertaining to or designating, an acid obtained from atropine and certain other alkaloids, as a white crystalline substance slightly soluble in water.
- (n.) One of the two parallels of terrestrial latitude corresponding to the celestial tropics, and called by the same names.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). tropic. Retrieved September 20, 2026, from http://smartdefine.org/tropic/definitions/2075067 |
| Chicago | Webster's. 2011. "tropic" http://smartdefine.org/tropic/definitions/2075067 (accessed September 20, 2026). |
| Harvard | Webster's 2011, tropic, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/tropic/definitions/2075067>. |
| MLA | Webster's. "tropic" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/tropic/definitions/2075067> |