Term:

Neotropics (adj.= neotropical)
Definition:

Referring to that part of the earth in the New World between the Tropic of Cancer at 23 degrees 27 minutes N and the Tropic of Capricorn at 23 degress 27 minutes S. These are the northern and southern latitudes at which the sun can be directly overhead at some time during the year. Same as New World tropics.
Related Terms:

Paleotropics
Tropics