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What is an apple?

An apple is the fruit of the apple tree, Malus domestica, a widely cultivated plant of the rose family (Rosaceae). The modern apple is believed to have been domesticated from a wild apple, M. sieversii, in the Tien Shan mountains in Central Asia. The apple itself is a pome, a type of fleshy fruit. When harvested, apples are usually roundish, 5–10 cm (2–4 inches) in diameter, and some shade of red, green, or yellow. They are predominantly grown for sale as fresh fruit, though also used commercially for vinegar, juice, and other applications.