The Collaborative International Dictionary of English v.0.48:

Crowfoot \Crow"foot`\ (kr?"f??t`), n.
   1. (Bot.) The genus Ranunculus, of many species; some are
      common weeds, others are flowering plants of considerable
      beauty.
      [1913 Webster]

   2. (Naut.) A number of small cords rove through a long block,
      or euphroe, to suspend an awning by.
      [1913 Webster]

   3. (Mil.) A caltrop. [Written also crow's-foot.]
      [1913 Webster]

   4. (Well Boring) A tool with a side claw for recovering
      broken rods, etc. --Raymond.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Crow's-foot \Crow's"-foot`\ (kr?z"f??t`), n.; pl. Crow's-feet
   (-f[=e]t`).
   [1913 Webster]
   1. pl. The wrinkles that appear, as the effect of age or
      dissipation, under and around the outer corners of the
      eyes. --Tennyson.
      [1913 Webster]

   2. (Mil.) A caltrop. [Written also crowfoot.]
      [1913 Webster]

   3. (Arch.) Same as Bird's-mouth. [U.S.]
      [1913 Webster]

WordNet (r) 3.0 (2006):

crowfoot
    n 1: any of various plants of the genus Ranunculus [syn:
         buttercup, butterflower, butter-flower, crowfoot,
         goldcup, kingcup]