infrasonic /in-frə-sonˈik/ (acoustics)

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

inˈfrasound noun

• Pompeian red
• pompelmoose
• pompelmooses
• pompelmous
• pompelmouse
• pompelo
• pompelos
• pompey
• Pompey
• pompeyed
• pompeying
• pompeys
• pompholygous
• pompholyx
• pompholyxes
• pompier
• pompier-ladder
• pompier-ladders
• pompion
• pom-pom
• pompom
• pom-poms
• pompoms
• pompon
• pompons