also known as the minor flatted fifth (m♭5), 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♭.[3] It resembles a minor triad with a lowered (flattened) fifth. It can be represented by the integer notation {0, 3, 6}.
Diminished triad on C About this sound play (help·info).
iio6 in C minor About this sound play (help·info): first inversion do chord.
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.