American Dictionary of the English Language

PENTADAC'TYL, noun [Gr. five, and finger.]

1. In botany, a plant called five fingers; a name given to the Ricinus or Palma Christi, from the shape of its leaf.

2. In ichthyology, the five fingered fish; a name given to a fish common in the East Indian seas, which has five black streaks on each side resembling the prints of five fingers.