a slow, powerful buffalo (Bubalus bubalis) native to S Asia, Malaya, and the Philippine Islands, having a pair of large, strong horns growing from the sides of the head: it likes to wallow in mud and is used as a draft animal
See water buffalo in American Heritage Dictionary 4
noun
A large buffalo (Bubalus bubalis) of Asia, often domesticated especially as a draft animal and having large spreading horns. Also called carabao, water ox.