prawn

from WordNet (r) 3.0 (2006)

prawn
    n 1: any of various edible decapod crustaceans [syn: {prawn},
         {shrimp}]
    2: shrimp-like decapod crustacean having two pairs of pincers;
       most are edible
    v 1: fish for prawns

from The Collaborative International Dictionary of English v.0.48

Prawn \Prawn\, n. [OE. prane, of unknown origin; cf. L. perna a
   sea mussel.] (Zool.)
   Any one of numerous species of large shrimplike Crustacea
   having slender legs and long antenn[ae]. They mostly belong
   to the genera {Pandalus}, {Pal[ae]mon}, {Pal[ae]monetes}, and
   {Peneus}, and are much used as food. The common English prawn
   is {Pal[ae]mon serratus}.
   [1913 Webster]

   Note: The name is often applied to any large shrimp.
         [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

24 Moby Thesaurus words for "prawn":
      Dungeness crab, Japanese crab, blue point, clam, coquillage, crab,
      crawdad, crawfish, crayfish, langouste, limpet, littleneck clam,
      lobster, mussel, oyster, periwinkle, quahog, scallop, shellfish,
      shrimp, snail, soft-shell crab, steamer, whelk