The region of the Earth, centred on the equator and lying between the Tropic of Cancer and the Tropic of Capricorn and characterized by a hot climate.(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "tropics" in a sentence
"One of the problems with living on the coast in the tropics is the terrible heat in the summer time (someone mentioned that about Mérida)."
"CHARLES: Temperatures in the tropics are the same across thousands of miles, from Mexico City to Sao Paulo, Brazil."
"The other important weather feature in the tropics is the subtropical high pressure zone."