'Photophone' definitions:
Definition of 'Photophone'
From: 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]