Paca \Pa"ca\, n. [Pg., from the native name.]

(Zo["o]l.) A small South American rodent (C[oe]logenys paca), having blackish brown fur, with four parallel rows of white spots along its sides; the spotted cavy. It is nearly allied to the agouti and the Guinea pig.

Source: Webster's Revised Unabridged Dictionary (1913)