WordNet (r) 3.0 (2006):

black hickory
    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]
    2: an American hickory tree having bitter nuts [syn: pignut,
       pignut hickory, brown hickory, black hickory, Carya
       glabra]
    3: North American walnut tree with hard dark wood and edible nut
       [syn: black walnut, black walnut tree, black hickory,
       Juglans nigra]