ranunculus aquatilis

from WordNet (r) 3.0 (2006)

Ranunculus aquatilis
    n 1: plant of ponds and slow streams having submerged and
         floating leaves and white flowers; Europe and North America
         [syn: {water crowfoot}, {water buttercup}, {Ranunculus
         aquatilis}]

from The Collaborative International Dictionary of English v.0.48

Water crowfoot \Wa"ter crow"foot`\ (Bot.)
   An aquatic kind of buttercup ({Ranunculus aquatilis}), used
   as food for cattle in parts of England.
   [1913 Webster]

   {Great water crowfoot}, an American water plant ({Ranunculus
      multifidus}), having deep yellow flowers.
      [1913 Webster]