† ˈpistack, ˈpistakeObs. Anglicized forms of pistachio, chiefly in comb. See also pistick. 1591Percivall Sp.Dict., Alhostigo, alhocigo, pistacke tree.1639Horn & Rob.Gate Lang. Unl. xi. §123 Pistakes, services, carobs,..dates.1658Phillips, Pistachoes, or Pistack [ed. 1706 Pistake] Nuts.