Source : Webster's Revised Unabridged Dictionary (1913)

Disjunct \Dis*junct"\, a. [L. disjunctus, p. p. of disjungere to
   disjoin. See {Disjoin}, and cf. {Disjoint}.]
   1. Disjoined; separated. [R.]

   2. (Zo["o]l.) Having the head, thorax, and abdomen separated
      by a deep constriction.

   {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.