infrasonic /in-frə-sonˈik/ (acoustics)

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

• methadon
• methadone
• methadones
• methamphetamine
• methanal
• methanals
• methane
• methanes
• methanogen
• methanoic acid
• methanol
• methanols
• methanometer
• methanometers
• methaqualone
• methaqualones
• Methedrine
• metheglin
• metheglins
• methicillin
• iron-foundry
• iron-glance
• iron-gray
• iron-grays
• iron-grey