webfoot

from WordNet (r) 3.0 (2006)

webfoot
    n 1: a foot having the toes connected by folds of skin

from The Collaborative International Dictionary of English v.0.48

Webfoot \Web"foot`\, n.; pl. {Webfeet}.
   [1913 Webster]
   1. A foot the toes of which are connected by a membrane.
      [1913 Webster]

   2. (Zool.) Any web-footed bird.
      [1913 Webster]