or u·nis·o·nal, u·nis·o·nant
- being in unison.
Origin of unisonous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for unisonous
The unisonous quality of octaves is easily explained when we examine the “harmonic series” of upper partials (see Sound).