Octachord

Noun

oc=ta=chord

CIDE DICTIONARY

Octachord, n. [Gr. with eight strings; 'okta- (for 'oktw` eight) + string, chord: cf. F. octacorde.].

An instrument of eight strings; a system of eight tones. [1913 Webster]

For further exploring for "Octachord" in Webster Dictionary Online

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