noun1. (sometimes capital) either of the parallel lines of latitude at about 231⁄2°N (tropic of Cancer) and 231⁄2°S (tropic of Capricorn) of the equator
2. the tropics
3. astronomy either of the two parallel circles on the celestial sphere having the same latitudes and names as the corresponding lines on the earth
adjective4. a less common word for tropical
Word origin
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