Three-lobed leaf

from The Collaborative International Dictionary of English v.0.48

Three-lobed \Three"-lobed`\, a.
   Having three lobes.
   [1913 Webster]

   {Three-lobed leaf} (Bot.), a leaf divided into three parts,
      the sinuses extending not more than half way to the
      middle, and either the parts of the sinuses being rounded.
      [1913 Webster]