shaddock

from WordNet (r) 3.0 (2006)

shaddock
    n 1: southeastern Asian tree producing large fruits resembling
         grapefruits [syn: {pomelo}, {pomelo tree}, {pummelo},
         {shaddock}, {Citrus maxima}, {Citrus grandis}, {Citrus
         decumana}]
    2: large pear-shaped fruit similar to grapefruit but with coarse
       dry pulp [syn: {pomelo}, {shaddock}]

from The Collaborative International Dictionary of English v.0.48

Shaddock \Shad"dock\, n. [Said to be so called from a Captain
   Shaddock, who first brought this fruit from the East Indies.]
   (Bot.)
   A tree ({Citrus decumana}) and its fruit, which is a large
   species of orange; -- called also {forbidden fruit}, and
   {pompelmous}.
   [1913 Webster]

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