Disjunct, Disjunction

Two tetrachords whose extreme tones are separated by an intervening interval are termed disjunct. The separation is called the disjunction.

In Greek music theory the disjunction is a 9/8 whole tone, but in Schlesinger's Harmoniai, different sized disjunctive tones occur.

[from John Chalmers, Divisions of the Tetrachord]

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