Dated form of pistachio.

plural of piston engine

(now historical) A Spanish silver coin worth two reales, used as common currency in the Americas in the 18th century.

plural of pistareen

A semi-automatic handgun designed to be carried inconspicuously in a pocket of one's clothing. / Any handgun suitable to be carried in a pocket of one's clothing, usually of a small caliber.

(historical) A small flintlock gun, usually for women, which can be hidden in a muff (hand-warmer).

A lightweight submachine gun, usually capable of being fired with one hand (but sometimes with a second grip at the front of the barrel and then fired like a rifle).

(skiing) Someone who skis or snowboards off-piste

plural of pistick

(obsolete, sometimes attributive) A pistachio nut.