sorb apple

from WordNet (r) 3.0 (2006)

sorb apple
    n 1: medium-sized European tree resembling the rowan but bearing
         edible fruit [syn: {service tree}, {sorb apple}, {sorb
         apple tree}, {Sorbus domestica}]
    2: acid gritty-textured fruit [syn: {sorb}, {sorb apple}]

from The Collaborative International Dictionary of English v.0.48

Sorb \Sorb\, n.[L. sorbus the tree, sorbum the fruit; cf. F.
   sorbe. See {Service tree}.] (Bot.)
   (a) The wild service tree ({Pyrus torminalis}) of Europe;
       also, the rowan tree.
   (b) The fruit of these trees.
       [1913 Webster]

   {Sorb apple}, the fruit of the sorb, or wild service tree.

   {Sorb tree}, the wild service tree.
      [1913 Webster]