persimmon

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of various chiefly tropical trees of the genus Diospyros, having hard wood and orange-red fruit with sweet usually soft pulp, especially D. kaki, native to East Asia, and D. virginiana, native to the eastern United States.
• noun The fruit of any of these trees.

from The Century Dictionary.

• noun One of several species of the genus Dsipyros; primarily, D. Virginiana of North America, the date-plum, a tree common in the South, growing to a height of 60 feet.
• noun The fruit of any of the above-named trees.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) An American tree (Diospyros Virginiana) and its fruit, found from New York southward. The fruit is like a plum in appearance, but is very harsh and astringent until it has been exposed to frost, when it becomes palatable and nutritious.
• noun Diospyros Kaki and its red or yellow edible fruit, which outwardly resembles a tomato, but contains a few large seeds.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A type of fruit, of orange colour, very sweet, quite astringent when immature.
• noun The tree this fruit grows on, generally one of two species of ebony: Diospyros kaki (Asian) or Diospyros virginiana (North American).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any of several tropical trees of the genus Diospyros
• noun orange fruit resembling a plum; edible when fully ripe