Photophone

1 definition found

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

  Photophone \Pho"to*phone\ (f[=o]"t[-o]*f[=o]n), n. [Photo- + Gr.
     fwnh` sound.] (Physics)
     An apparatus for the production of sound by the action of
     rays of light. --A. G. Bell.
     [1913 Webster]