The Collaborative International Dictionary of English v.0.48:

Mutoscope \Mu"to*scope\, n. [L. mutare to change + -scope.]
   A simple form of moving-picture machine in which the series
   of views, exhibiting the successive phases of a scene, are
   printed on paper and mounted around the periphery of a wheel.
   The rotation of the wheel brings them rapidly into sight, one
   after another, and the blended effect gives a semblance of
   motion.
   [Webster 1913 Suppl.]