Source : Webster's Revised Unabridged Dictionary (1913)

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

   2. Having five appendages resembling fingers or toes.