Pistachio, a small, resinous tree with edible seeds. It is related to the mango and pepper tree. The pistachio is native to Asia Minor. It is cultivated in many warm countries for the seeds, called pistachio nuts or green almonds. (Botanically speaking, these are not actually nuts but the kernels of fruits called drupes.) The nut is green or ivory and about one inch (2.5 cm) long. It has a delicate, rather almondlike taste. The pod is often dyed bright pinkish-red to hide blemishes. Pistachio nuts are eaten raw or roasted and salted, are used to decorate cakes, or are pressed for a greenish oil used to flavor candy, ice cream, or sauces.
The pistachio is Pistacia vera of the cashew family, Anacardiaceae.The pistachio nut is green or ivory and about one inch long.