The Collaborative International Dictionary of English v.0.48:

Creeper \Creep"er\ (kr[=e]p"[~e]r), n.
   1. One who, or that which, creeps; any creeping thing.
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            Standing waters are most unwholesome, . . . full of
            mites, creepers; slimy, muddy, unclean. --Burton.
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   2. (Bot.) A plant that clings by rootlets, or by tendrils, to
      the ground, or to trees, etc.; as, the Virginia creeper
      (Ampelopsis quinquefolia).
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   3. (Zool.) A small bird of the genus Certhia, allied to the
      wrens. The brown or common European creeper is Certhia
      familiaris, a variety of which (var. Americana) inhabits
      America; -- called also tree creeper and creeptree.
      The American black and white creeper is Mniotilta varia.
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   4. A kind of patten mounted on short pieces of iron instead
      of rings; also, a fixture with iron points worn on a shoe
      to prevent one from slipping.
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   5. pl. A spurlike device strapped to the boot, which enables
      one to climb a tree or pole; -- called often telegraph
      creepers.
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   6. A small, low iron, or dog, between the andirons.
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   7. pl. An instrument with iron hooks or claws for dragging at
      the bottom of a well, or any other body of water, and
      bringing up what may lie there.
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   8. Any device for causing material to move steadily from one
      part of a machine to another, as an apron in a carding
      machine, or an inner spiral in a grain screen.
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   9. pl. (Arch.) Crockets. See Crocket.
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WordNet (r) 3.0 (2006):

Certhia familiaris
    n 1: common European brown-and-buff tree creeper with down-
         curved bill [syn: European creeper, Certhia familiaris]