The Collaborative International Dictionary of English v.0.48:

Pentadactyl \Pen`ta*dac"tyl\, Pentadactyle \Pen`ta*dac"tyle\, a.
   [Gr. pentada`ktylos with five fingers or toes. See Penta-,
   and Dactyl.]
   1. (Anat.) Having five digits to the hand or foot.
      [1913 Webster]

   2. Having five appendages resembling fingers or toes.
      [1913 Webster]