infrasonic /in-frə-sonˈik/ (acoustics)

1. (of frequencies) below the usual audible limit
2. Of, using or produced by infrasonic vibrations or pressure waves

• multituberculated
• multitude
• multitudes
• multitudinary
• multitudinous
• multitudinously
• multitudinousness
• multiuser
• multivalence
• multivalences
• multivalencies
• multivalency
• multivalent
• multivariate
• multivarious
• multiverse
• multiverses
• multiversity
• multivibrator
• multivibrators
• multivious
• multi-vision
• multivitamin
• multivitamins
• multivocal