Pistachio
Pronunciation : Pis*ta"chio
Part of Speech : n.
Etymology : [It. pistacchio (cf. Sp. pistacho, F. pistache), fr. L. pistacium, Gr. pistah. Cf. Fistinut.] (Bot.)
Definition : Defn: The nut of the Pistacia vera, a tree of the order Anacardiace?, containing a kernel of a pale greenish color, which has a pleasant taste, resembling that of the almond, and yields an oil of agreeable taste and odor; -- called also pistachio nut. It is wholesome and nutritive. The tree grows in Arabia, Persia, Syria, and Sicily. [Written also pistachia.]
Source : Webster's Unabridged Dictionary, 1913