What does "indri" mean?

Indri: Any lemurine animal of the genus Indris. Note: Several species are known, all of them natives of Madagascar, as the diadem indris (I. diadema), which has a white ruff around the forehead; the woolly indris (I. laniger); and the short-tailed or black indris (I. brevicaudatus), which is black, varied with gray.