\Pa"co\, Pacos \Pa"cos\, n. [Sp. paco, fr. Peruv. paco. Cf.
{Alpaca}.]
1. (Zo["o]l.) Same as {Alpaca}.
2. [Peruv. paco, pacu, red, reddish, reddish ore containing
   silver; perh. a different word.] (Min.) An earthy-looking
   ore, consisting of brown oxide of iron with minute
   particles of native silver. --Ure.