(n.) An apparatus for the production of sound by the action of luminous or thermal rays. It is essentially the same as the photophone.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). radiophone. Retrieved September 24, 2026, from http://smartdefine.org/radiophone/definitions/2052315 |
| Chicago | Webster's. 2011. "radiophone" http://smartdefine.org/radiophone/definitions/2052315 (accessed September 24, 2026). |
| Harvard | Webster's 2011, radiophone, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/radiophone/definitions/2052315>. |
| MLA | Webster's. "radiophone" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/radiophone/definitions/2052315> |