tetrachord

noun tet·ra·chord \ ˈte-trə-ˌkȯrd \

Definition of tetrachord

: a diatonic series of four tones with an interval of a perfect fourth between the first and last

Origin and Etymology of tetrachord

Greek tetrachordon, from neuter of tetrachordos of four strings, from tetra- + chordē string — more at yarn


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