Disjunct tetrachords

(Mus.) tetrachords so disposed to each other that the gravest note of the upper is one note higher than the acutest note of the other.

See also: Disjunct

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive
The two anonymous treatises that it translates have become celebrated for a variety of reasons: the `poor Greek and worse Latin' (Palisca's phrase) of their titles, their system of disjunct tetrachords and its expression in `dasian' (or `daseian') characters, and their account of what was evidently a contemporary form of polyphonic practice.
Instead, these theorists adopted an 18-note system consisting entirely of disjunct tetrachords of the form tone-semitone-tone.
Musica enchiriadis and Scolica enchiriadis
Thereafter (measure 159), the manuals begin the dramatic ascent to the highest notes of the piece, each hand playing primarily in disjunct tetrachords voiced as interlocked pi5s, pi6s and pi7s.
Interval and form in Ligeti's 'Continuum' and 'Coulee.' (Gyorgy Ligeti) (Ligeti Forum)
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