rain frog
noun
1 US and Caribbean a small tree frog of the genus Hyla (family Hylidae), especially the common H. squirella.
2Any of various large Old World burrowing frogs of the families Brevicipitidae and Microhylidae, especially of the African genus Breviceps.
Origin
Early 19th century; earliest use found in Thomas Loraine McKenney (1785–1859).