diaphone

noun
dia·​phone | \ ˈdī-ə-ˌfōn How to pronounce diaphone (audio) \

Definition of diaphone

: a fog signal similar to a siren but producing a blast of two tones

First Known Use of diaphone

1906, in the meaning defined above

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The first known use of diaphone was in 1906

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Cite this Entry

“Diaphone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diaphone. Accessed 12 Aug. 2020.

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Britannica.com: Encyclopedia article about diaphone

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