̷ ̷ˌ ̷ ̷ ̷ ̷ˈneˌfräs noun
( plural opis·tho·neph·roi -ˌfrȯi)
Etymology: New Latin, from opisth- + Greek nephros kidney — more at nephritis
: the adult kidney of animals (as some amphibians) that are commonly considered mesonephric as adults, resembling but not identical to the embryonic mesonephros