Source : Webster's Revised Unabridged Dictionary (1913)

Chinquapin \Chin"qua*pin\, n. (Bot.)
   A branching, nut-bearing tree or shrub ({Castanea pumila}) of
   North America, from six to twenty feet high, allied to the
   chestnut. Also, its small, sweet, edible nat. [Written also
   {chincapin} and {chinkapin}.]

   {Chinquapin oak}, a small shrubby oak ({Quercus prinoides})
      of the Atlantic States, with edible acorns.

   {Western Chinquapin}, an evergreen shrub or tree ({Castanopes
      chrysophylla}) of the Pacific coast. In California it is a
      shrub; in Oregon a tree 30 to 125 feet high.

Source : WordNet®

chinquapin
     n 1: shrubby tree closely related to the Allegheny chinkapin but
          with larger leaves; southern midwest United States [syn:
           {Ozark chinkapin}, {Ozark chinquapin}, {Castanea
          ozarkensis}]
     2: shrubby chestnut tree of southeastern United States having
        small edible nuts [syn: {Allegheny chinkapin}, {eastern
        chinquapin}, {dwarf chestnut}, {Castanea pumila}]
     3: small nut of either of two small chestnut trees of the
        southern United States; resembles a hazelnut [syn: {chincapin},
         {chinkapin}]