The Collaborative International Dictionary of English v.0.48:

Fissipalmate \Fis`si*pal"mate\, a. [L. fissus (p. p. of findere
   to split) + palma palm.] (Zool.)
   Semipalmate and loboped, as a grebe's foot. See Illust. under
   Aves.
   [1913 Webster]