noun
- a South American tailless rodent, Hydrochaeris hydrochaeris, living along the banks of rivers and lakes, having partly webbed feet: the largest living rodent.
noun
- the largest rodent: a pig-sized amphibious hystricomorph, Hydrochoerus hydrochaeris, resembling a guinea pig and inhabiting river banks in Central and South America: family Hydrochoeridae
South American rodent, 1774, from some Tupi (Brazilian) native name.