ETYM Italian pistacchio (cf. Spanish pistacho, French pistache), from Latin pistacium. Related to Fistinut.
1. Nut of Mediterranean trees having an edible green kernel; SYN. pistachio nut.
2. Small tree of southern Europe and Asia Minor bearing small hard-shelled nuts; SYN. Pistacia vera, pistachio tree.
Deciduous Eurasian tree Pistacia vera of the cashew family Anacardiaceae, with green nuts, which are eaten salted or used to enhance and flavor foods.