erakordsete
Erakordsete is a term used in Estonian music theory to describe chords that fall outside the common diatonic triads and widely used extended chords. The label is often translated as "unusual chords" or "non-standard chords" and is applied in discussions of harmony to describe coloristic or functionally atypical harmonies.
The concept is not tied to a single formal definition; different authors may include different chord types
In Estonian analytical writing, erakordsete forms are discussed primarily in modern and contemporary contexts, including popular
See also harmoonia, tonaalsus, modal mixture, chromatic mediants, cluster chords, polytonality.