Source : Webster's Revised Unabridged Dictionary (1913)

Bullhead \Bull"head`\, n.
   1. (Zo["o]l.)
      (a) A fresh-water fish of many species, of the genus
          {Uranidea}, esp. {U. gobio} of Europe, and {U.
          Richardsoni} of the United States; -- called also
          {miller's thumb}.
      (b) In America, several species of {Amiurus}; -- called
          also {catfish}, {horned pout}, and {bullpout}.
      (c) A marine fish of the genus {Cottus}; the sculpin.

   2. (Zo["o]l.)
      (a) The black-bellied plover ({Squatarola helvetica}); --
          called also {beetlehead}.
      (b) The golden plover.

   3. A stupid fellow; a lubber. [Colloq.] --Jonson.

   4. (Zo["o]l.) A small black water insect. --E. Phillips.

   {Bullhead whiting} (Zo["o]l.), the kingfish of Florida
      ({Menticirrus alburnus}).