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photophone

noun
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pho·​to·​phone

Definition of photophone

: a device whereby a sound signal (as a voice) is transmitted by causing it to modulate a beam of visible or infrared light which is received by a photoelectric cell, amplified, and reconverted into sound

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History and Etymology for photophone

phot- + -phone

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Cite this Entry

“Photophone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photophone. Accessed 7 Mar. 2021.

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