| 单词 | half-diminished seventh | 
| 释义 | half-diminished seventhnoun variants  or half-diminished seventh chord    : a seventh chord consisting of a diminished triad with a minor seventh above the root  Schoenberg exploited precisely such intervallic relationships in his twelve-tone works such as the Piano Piece, Op. 33a (1929), the opening chords of which feature a similar transformation of a dominant seventh to a half-diminished seventh.  The half-diminished seventh chord became a widely-employed source in nineteenth-century harmony because of its flexible communication between relative major and minor modes … … the half-diminished seventh chord is in many respects the star of the seventh chord harmonic cast.see seventh chord | 
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