PISTACIA, in botany, a genus of the dioecia pentandria class. The calix of the amentum in the male consists of five segments; it has no corolla. The calix of the female consists of three segments; it has no corolla; there are three styli; and the drupa contains one seed. There are five species, all natives of warm climates.
Pistachia-nuts abound with a sweet and well-tasted oil, which they will yield in great abundance, on being pressed after bruising them: they are reckoned wholesome and nutritive, and are very proper to be prescribed by way of restoratives, eaten in a moderate quantity, and to people emaciated with long illnesses.