Emily Dickinson Lexicon

PIC-A-ROON', n. [Fr. picoreur, from picorer, to plunder; Scot. pikary, rapine; from the root of pick, peck, Sp. picar.]

A plunderer; a pirate. This word is not applied to a highway robber, but to pirates and plunderers of wrecks. In all wars, Corsica and Majorca have been nests of picaroons. – Temple.