GNU Collaborative International Dictionary of English

Found one definition

1.       
   paca (Pg. päˈkȧ; E. pāˈkȧ), n. [Pg., from the native name.]
   1. (Zool.) A large burrowing South American rodent (Agouti paca syn. Cuniculus paca, formerly Cœlogenys paca), having blackish brown fur, with four parallel rows of white spots along its sides; the spotted cavy.  It is closely allied to the agouti and the Guinea pig and is highly esteemed as food.
   
   [1913 Webster]