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

Dictionary Entries Near diaphone

Cite this Entry

“Diaphone.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diaphone. Accessed 25 Feb. 2024.

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