diaphone

noun

dia·​phone ˈdī-ə-ˌfōn How to pronounce diaphone (audio)
: a fog signal similar to a siren but producing a blast of two tones

Word History

First Known Use

1906, in the meaning defined above

Time Traveler
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 9 Mar. 2025.

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