noun. Any of several South American rodents of the genera Lagostomus and Lagidium, having large ears and a bushy tail, some species of which live in elaborate systems of burrows.

noun. A South American rodent mammal, of the family Chinchillidæ and genus Lagostomus, L. trichdactylus, inhabiting the pampas, and playing there the same part in the fauna that is taken in North America by the prairie-dogs and other spermophiles.

noun. A large burrowing South American rodent (Lagostomus trichodactylus) allied to the chinchillas, but much larger. Its fur is soft and rather long, mottled gray above, white or yellowish white beneath. There is a white band across the muzzle, and a dark band on each cheek. It inhabits grassy plains, and is noted for its extensive burrows and for heaping up miscellaneous articles at the mouth of its burrows. Called also biscacha, bizcacha, vischacha, vishatscha.

noun. A rodent native to the Andes Mountains of South America, in the chinchilla family Chinchillidae.

noun. gregarious burrowing rodent larger than the chinchillas

""Then there is the taruco, a kind of deer, the viscacha, which is a big rat, the otoc, a sort of wild dog, or fox, and the ucumari, a black bear with a white nose."

alpine viscacha  

viz-cacha  

gnawer  rodent  

biscacha  bizcacha  vischacha  vishatscha