adjective \ˌdī-ə-ˈtä-nik\

music : of or relating to a musical scale that has five whole steps and two semitones

Full Definition of DIATONIC

:  of, relating to, or being a musical scale (as a major or minor scale) comprising intervals of five whole steps and two half steps
dia·ton·i·cal·ly \-ˈtä-ni-k(ə-)lē\ adverb

Origin of DIATONIC

Late Latin diatonicus, from Greek diatonikos, from diatonos stretching, from diateinein to stretch out, from dia- + teinein to stretch — more at thin
First Known Use: 1694


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