Cavy may refer to several species of mammal in the family Caviidae, a family of rodents native to South America: any species of the genus Cavia, including Cavia porcellus, the domestic Guinea pig either species of the genus Dolichotis, viz the Patagonian Mara (sometimes called the "Patagonian Cavy") and the Chacoan Mara either species of the genus Kerodon, viz the Acrobatic Cavy and the Rock Cavy… (More on Cavy)