thaumatrope: Meaning and Definition of

thau•ma•trope

Pronunciation: (th'mu-tr?p"), [key]
? n.
  1. a card with different pictures on opposite sides, as a horse on one side and a rider on the other, which appear as if combined when the card is twirled rapidly, thus illustrating the persistence of visual impressions.
Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease.