What is "peterero"

Pederero \Ped`e*re"ro\, n. [Sp. pedrero, fr. OSp. pedra, Sp. piedra, a stone, L. petra, fr. Gr. ?. So named because it was at first charged with stones.] (Mil.) A term formerly applied to a short piece of chambered ordnance. [Written also paterero and peterero.]

n. (alternative form of pederero English)