Jisho

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Noun
1. diminished chord; diminished triadMusic
Wikipedia definition
2. Diminished triadIn music, a diminished triad is a triad consisting of two minor thirds above the root — if built on C, a diminished triad would have a C, an E♭ and a G♭. It resembles a minor triad with a lowered fifth. In the common practice period, the diminished triad is considered dissonant, or unstable. It lacks tonal center or drive because the diminished fifth symmetrically divides the octave.
Read “Diminished triad” on English Wikipedia
Read “減三和音” on Japanese Wikipedia
Read “Diminished triad” on DBpedia

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