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Etymology 1 n. 1 A kind of organ pipe. 2 A sound signal which produces sound by means of a slotted piston moved back and forth by compressed air. Etymology 2

n. 1 (context linguistics English) A particular dialectal variant of a phoneme. 2 All the dialectal variants of a phoneme, considered as a whole.


n. a foghorn that makes a signal consisting of two tones


The diaphone is a noisemaking device best known for its use as a foghorn: It can produce deep, powerful tones, able to carry a long distance. Although they have fallen out of favor, diaphones were also used at some fire stations and in other situations where a loud, audible signal was required.

Diaphone (moth)

Diaphone is a genus of moths of the Noctuidae family.

Usage examples of "diaphone".

The sound of an air diaphone fog signal emitted from the loud-speaker.

The engine started up with a roar, and the renewed cheers were drowned out when the tanker that towered above the pumping station sounded its great diaphone horn.