夷い則そく

noun

9th note of the ancient Chinese chromatic scale (approx. A♯)

Technical term from ancient Chinese music theory, part of the 十二律 (twelve pitches). Rarely used outside historical or musicological contexts.

See also: 十二律 · 鸞鏡

• 夷い則そくは中ちゅう国ごくの十じゅう二に律りつの第だい九く番ばん目めの音おん律りつである。

  Isoku is the ninth pitch of the Chinese twelve-tone scale.

noun

seventh lunar month

Archaic term for the seventh month of the lunar calendar, derived from the corresponding pitch in the ancient Chinese system. Not used in modern Japanese.

• 旧きゅう暦れきでは、夷い則そくは七しち月がつを指さすことがあった。

  In the old lunar calendar, Isoku sometimes referred to the seventh month.