Category:Thaumatrope

Thau"ma*trope, n. Etym: [gr. (opt.)

Defn: an optical instrument or toy for showing the presistence of an Impression upon the eyes after the luminous object is withdrawn.

Note: it consists of a card having on its opposite faces figures of Two different objects, or halves of the same object, as a bird and a Cage, which, when the card is whirled rapidlz round a diameter by the Strings that hold it, appear to the eye combined in a single picture, As of a bird in its cage.