chordal

adjective4

1. •
   Of, pertaining to, or consisting of chords.

   • They play very well together, with Vogl providing the melodic and chordal framework and Shanbaum riffing over it. — 1985
2. •
   Having an accompaniment of chords rather than a countermelody.
3. •
   Having a notochord; chordate
4. •
   For a graph, in which all cycles of four or more vertices have a chord.