Source : Webster's Revised Unabridged Dictionary (1913)

Bird's-foot \Bird's"-foot`\, n. (Bot.)
   A papilionaceous plant, the {Ornithopus}, having a curved,
   cylindrical pod tipped with a short, clawlike point.

   {Bird's-foot trefoil}. (Bot.)
   (a) A genus of plants ({Lotus}) with clawlike pods. {L.
       corniculatas}, with yellow flowers, is very common in
       Great Britain.
   (b) the related plant, {Trigonella ornithopodioides}, is also
       European.