Source : Webster's Revised Unabridged Dictionary (1913)

Zoopraxiscope \Zo`["o]*prax"i*scope\, n. [Zo["o]- + Gr. ? a
   doing, an acting (from ? to do) + -scope.]
   An instrument similar to, or the same as, the, the
   phenakistoscope, by means of which pictures projected upon a
   screen are made to exhibit the natural movements of animals,
   and the like.