Cavy \Ca"vy\, n.; pl. Cavies. [NL. cavia, fr. Brazilian cabiai: cf. F. cabiai.]

(Zo["o]l.) A rodent of the genera Cavia and Dolichotis, as the guinea pig (Cavia cobaya). Cavies are natives of South America.

Water cavy (Zo["o]l.), The capybara.

Source: Webster's Revised Unabridged Dictionary (1913)