sound wave 
noun Physics
A wave of compression and rarefaction, by which sound is propagated in an elastic medium such as air.Ultrasound uses high frequency sound waves and magnetic resonance imaging uses radio waves....
- Instead of sound waves, the team used a powerful laser pulse to create a bubble inside the water tank.
- The bubbles grow in size until they are collapsed rapidly by the compression region of the sound wave.
- lehnga
- lehr
- Lehrer, Jim
- Lehár, Franz
- lei
- Leibniz, Gottfried Wilhelm
- Leibnizian
- Leibniz theorem
- Leibovitz, Annie
- Leicester
- Leicester, Earl of
- Leicestershire
- Leichhardt, Ludwig
- Leics.
- Leiden
- Leigh, Janet
- Leighton, Frederic
- Leigh, Vivien
- Brown, John
- Brown, Lancelot
- brownness
- brown-nose
- brown-noser
- brownout
- brown owl