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  1. a foghorn producing a low-pitched, penetrating signal of two tones.
  2. Phonetics.
    1. a phoneme in one dialect corresponding to a similar but phonetically different phoneme in a related dialect.
    2. a group of sounds comprising all the phonetically different dialectal variants of a given phoneme in a language: The broad a and flat a of “half” are members of a single diaphone.
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Origin of diaphone

First recorded in 1905–10; dia- + -phone

Examples from the Web for diaphone

Historical Examples

  • In the Pedal department no reed or flue pipe can begin to compare with a Diaphone, either in attack or in volume of tone.

    The Recent Revolution in Organ Building

    George Laing Miller

British Dictionary definitions for diaphone


    1. the set of all realizations of a given phoneme in a language
    2. one of any number of corresponding sounds in different dialects of a language
  1. a foghorn that emits a two-toned signal
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Word Origin

C20: from dia (lect) + phone ²