The Collaborative International Dictionary of English v.0.48:

Coot \Coot\ (k[=oo]t), n. [Cf. D. koet, W. cwtair; cwta short,
   bodtailed + iar hen; cf. cwtau to dock. Cf. Cut.]
   1. (Zool.)
      (a) A wading bird with lobate toes, of the genus Fulica.
          The common European or bald coot is Fulica atra (see
          under bald); the American is Fulica Americana.
      (b) The surf duck or scoter. In the United States all the
          species of ([OE]demia are called coots. See
          Scoter. "As simple as a coot." --Halliwell.
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   2. A stupid fellow; a simpleton; as, a silly coot. [Colloq.]
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The Collaborative International Dictionary of English v.0.48:

Bald \Bald\ (b[add]ld), a. [OE. balled, ballid, perh. the p. p.
   of ball to reduce to the roundness or smoothness of a ball,
   by removing hair. [root]85. But cf. W. bali whiteness in a
   horse's forehead.]
   1. Destitute of the natural or common covering on the head or
      top, as of hair, feathers, foliage, trees, etc.; as, a
      bald head; a bald oak.
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            On the bald top of an eminence.       --Wordsworth.
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   2. Destitute of ornament; unadorned; bare; literal.
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            In the preface to his own bald translation.
                                                  --Dryden.
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   3. Undisguised. " Bald egotism." --Lowell.
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   4. Destitute of dignity or value; paltry; mean. [Obs.]
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   5. (Bot.) Destitute of a beard or awn; as, bald wheat.
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   6. (Zool.)
      (a) Destitute of the natural covering.
      (b) Marked with a white spot on the head; bald-faced.
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   Bald buzzard (Zool.), the fishhawk or osprey.

   Bald coot (Zool.), a name of the European coot (Fulica
      atra), alluding to the bare patch on the front of the
      head.
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WordNet (r) 3.0 (2006):

Fulica atra
    n 1: a coot found in Eurasia [syn: Old World coot, Fulica
         atra]