Source : Webster's Revised Unabridged Dictionary (1913)

Shrimp \Shrimp\, n. [OE. shrimp; -- probably so named from its
   shriveled appearance. See {Shrimp}, v.]
   1. (Zo["o]l.)
      (a) Any one of numerous species of macruran Crustacea
          belonging to {Crangon} and various allied genera,
          having a slender body and long legs. Many of them are
          used as food. The larger kinds are called also
          {prawns}. See Illust. of {Decapoda}.
      (b) In a more general sense, any species of the macruran
          tribe {Caridea}, or any species of the order
          Schizopoda, having a similar form.
      (c) In a loose sense, any small crustacean, including some
          amphipods and even certain entomostracans; as, the
          fairy shrimp, and brine shrimp. See under {Fairy}, and
          {Brine}.

Source : WordNet®

Crangon
     n : type genus of the family Crangonidae [syn: {genus Crangon}]