mockernut

from WordNet (r) 3.0 (2006)

mockernut
    n 1: smooth-barked North American hickory with 7 to 9 leaflets
         bearing a hard-shelled edible nut [syn: {mockernut},
         {mockernut hickory}, {black hickory}, {white-heart
         hickory}, {big-bud hickory}, {Carya tomentosa}]

from The Collaborative International Dictionary of English v.0.48

mockernut \mockernut\, mocker nut \mocker nut\n.
   1. (Bot.), A smooth-barked North American hickory ({Carya
      tomentosa}) with 7 to 9 leaflets bearing a hard-shelled
      edible nut, which is far inferior to the true shagbark
      hickory nut.

   Syn: mockernut hickory, black hickory, white-heart hickory,
        big-bud hickory, {Carya tomentosa} .
        [1913 Webster + WordNet 1.5]

   2. The fruit of the mockernut[1].
      [PJC]