Having or relating to two distinct tones or sounds; relating to the use of two tones in music or speech.
From Greek di- 'two' + tonos 'tone' + -ous (adjective suffix). Describes phenomena or systems characterized by the presence of two tones.
Some languages use diatonous speech patterns—like the difference between a statement and a question where only the tone of your voice changes at the end, shifting meaning entirely.
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