The Collaborative International Dictionary of English v.0.48:

Beetlehead \Bee"tle*head`\, n. [Beetle a mallet + head.]
   [1913 Webster]
   1. A stupid fellow; a blockhead. --Sir W. Scott.
      [1913 Webster]

   2. (Zool.) The black-bellied plover, or bullhead (Squatarola
      helvetica). See Plover.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bullhead \Bull"head`\, n.
   1. (Zool.)
      (a) A fresh-water fish of many species, of the genus
          Uranidea, esp. Uranidea gobio of Europe, and
          Uranidea 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.
          [1913 Webster]

   2. (Zool.)
      (a) The black-bellied plover (Squatarola helvetica); --
          called also beetlehead.
      (b) The golden plover.
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   3. A stupid fellow; a lubber. [Colloq.] --Jonson.
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   4. (Zool.) A small black water insect. --E. Phillips.
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   Bullhead whiting (Zool.), the kingfish of Florida
      (Menticirrus alburnus).
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