medlar

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

• noun A deciduous European tree (Mespilus germanica) in the rose family, having white flowers and edible apple-shaped fruit.
• noun The fruit of this plant, eaten fresh or made into preserves.

from The Century Dictionary.

• noun A small, generally bushy tree, Mespilus Germanica, related to the crab-apple, cultivated in gardens for its fruit. It is wild in central and southern Europe, but was introduced from western Asia. See Mespilus.
• noun The fruit of the above tree, resembling a small brown-skinned apple, but with a broad disk at the summit surrounded by the remains of the calyx-lobes.

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

• noun A tree of the genus Mespilus (Mespilus Germanica); also, the fruit of the tree. The fruit is something like a small apple, but has a bony endocarp. When first gathered the flesh is hard and austere, and it is not eaten until it has begun to decay.
• noun (Bot.) the loquat. See Loquat.
• noun (Bot.) a kind of thorn tree (Cratægus Azarolus); also, its fruit.

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

• noun A tree of the genus Mespilus
• noun the fruit of the tree. The fruit is something like a small apple, and it is not eaten until it has begun to decay, or more properly, blet.

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

• noun small deciduous tree of southern Africa having edible fruit
• noun a South African globular fruit with brown leathery skin and pithy flesh having a sweet-acid taste
• noun crabapple-like fruit used for preserves
• noun small deciduous Eurasian tree cultivated for its fruit that resemble crab apples