Pa"co (?), Pa"cos (?), n. [Sp. paco, fr. Peruv. paco. Cf. Alpaca.]
1. Zool.
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.
© Webster 1913.