[1] : The Collaborative International Dictionary of English v.0.48

miller \mill"er\ mi^l"~er, n.
   1. one who keeps or attends a flour mill or gristmill.
      1913 webster

   2. a milling machine.
      1913 webster

   3. zool.
      a a moth or lepidopterous insect; -- so called because
          the wings appear as if covered with white dust or
          powder, like a miller's clothes. called also moth
          miller.
      b the eagle ray.
      c the hen harrier. prov. eng.
          1913 webster

   miller's thumb. zool.
      a a small fresh-water fish of the genus uranidea
          formerly cottus, as the european species
          uranidea gobio, and the american uranidea
          gracilis; -- called also bullhead.
      b a small bird, as the gold-crest, chiff-chaff, and
          long-tailed tit. prov. eng.
          1913 webster
see also:
moth miller miller's thumb uranidea cottus uranidea gobio uranidea gracilis 
bullhead 

[2] : 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.
          1913 webster

   3. a stupid fellow; a lubber. colloq. --jonson.
      1913 webster

   4. zool. a small black water insect. --e. phillips.
      1913 webster

   bullhead whiting zool., the kingfish of florida
      menticirrus alburnus.
      1913 webster
see also:
uranidea uranidea gobio uranidea richardsoni miller's thumb amiurus catfish 
horned pout bullpout cottus squatarola helvetica beetlehead 
bullhead whiting menticirrus alburnus 

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