Phoneidoscope

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Phoneidoscope \Pho*nei"do*scope\, n. [Phono- + Gr. e'i^dos form
     + -scope.] (Physics)
     An instrument for studying the motions of sounding bodies by
     optical means. It consists of a tube across the end of which
     is stretched a film of soap solution thin enough to give
     colored bands, the form and position of which are affected by


     sonorous vibrations.
     [1913 Webster]