Source : Webster's Revised Unabridged Dictionary (1913)

Pomelo \Pom"e*lo\, n. [Cf. {Pompelmous}.]
   A variety of shaddock, called also {grape fruit}.

Source : WordNet®

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