Source : Webster's Revised Unabridged Dictionary (1913)

Plaice \Plaice\, n. [F. plaise, plais, prob. fr. L. platessa
   flatish, plaice. See {Place}.] (Zo["o]l.)
   (a) A European food fish ({Pleuronectes platessa}), allied to
       the flounder, and growing to the weight of eight or ten
       pounds or more.
   (b) A large American flounder ({Paralichthys dentatus};
       called also {brail}, {puckermouth}, and {summer
       flounder}. The name is sometimes applied to other allied
       species. [Written also {plaise}.]

   {Plaice mouth}, a mouth like that of a plaice; a small or wry
      mouth. [R.] --B. Jonson.

Flounder \Floun"der\, n. [Cf. Sw. flundra; akin to Dan. flynder,
   Icel. fly?ra, G. flunder, and perh. to E. flounder, v.i.]
   1. (Zo["o]l.) A flatfish of the family {Pleuronectid[ae]}, of
      many species.

   Note: The common English flounder is {Pleuronectes flesus}.
         There are several common American species used as food;
         as the smooth flounder ({P. glabra}); the rough or
         winter flounder ({P. Americanus}); the summer flounder,
         or plaice ({Paralichthys dentatus}), Atlantic coast;
         and the starry flounder ({Pleuronectes stellatus}).

   2. (Bootmaking) A tool used in crimping boot fronts.

Source : WordNet®

Paralichthys dentatus
     n : flounder of eastern coast of North America [syn: {summer
         flounder}]