The Collaborative International Dictionary of English v.0.48:

Miller \Mill"er\ (m[i^]l"[~e]r), n.
   1. One who keeps or attends a flour mill or gristmill.
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   2. A milling machine.
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   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.]
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   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.]
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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.
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   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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The Collaborative International Dictionary of English v.0.48:

Cob \Cob\, n. [Cf. AS. cop, copp, head, top, D. kop, G. kopf,
   kuppe, LL. cuppa cup (cf. E. brainpan), and also W. cob tuft,
   spider, cop, copa, top, summit, cobio to thump. Cf. Cop
   top, Cup, n.]
   1. The top or head of anything. [Obs.] --W. Gifford.
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   2. A leader or chief; a conspicuous person, esp. a rich
      covetous person. [Obs.]
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            All cobbing country chuffs, which make their bellies
            and their bags their god, are called rich cobs.
                                                  --Nash.
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   3. The axis on which the kernels of maize or indian corn
      grow. [U. S.]
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   4. (Zool.) A spider; perhaps from its shape; it being round
      like a head.
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   5. (Zool.) A young herring. --B. Jonson.
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   6. (Zool.) A fish; -- also called miller's thumb.
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   7. A short-legged and stout horse, esp. one used for the
      saddle. [Eng.]
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   8. (Zool.) A sea mew or gull; esp., the black-backed gull
      (Larus marinus). [Written also cobb.]
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   9. A lump or piece of anything, usually of a somewhat large
      size, as of coal, or stone.
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   10. A cobnut; as, Kentish cobs. See Cobnut. [Eng.]
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   11. Clay mixed with straw. [Prov. Eng.]
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             The poor cottager contenteth himself with cob for
             his walls, and thatch for his covering. --R. Carew.
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   12. A punishment consisting of blows inflictod on tho
       buttocas with a strap or a flat piece of wood. --Wright.
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   13. A Spanish coin formerly current in Ireland, worth abiut
       4s. 6d. [Obs.] --Wright.
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   Cob coal, coal in rounded lumps from the size of an egg to
      that of a football; -- called also cobbles. --Grose.

   Cob loaf, a crusty, uneven loaf, rounded at top. --Wright.

   Cob money, a kind of rudely coined gold and silver money of
      Spanish South America in the eighteenth century. The coins
      were of the weight of the piece of eight, or one of its
      aliquot parts.
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