longitudinal wave
noun Physics.
a wave in which the direction of displacement is the same as the direction of propagation, as a sound wave.
Compare
transverse wave.
Origin of longitudinal wave
First recorded in 1930–35
Words nearby longitudinal wave
British Dictionary definitions for longitudinal wave
longitudinal wave
noun
a wave that is propagated in the same direction as the displacement of the transmitting medium
Compare transverse wave
Scientific definitions for longitudinal wave
longitudinal wave
A wave that oscillates back and forth on an axis that is the same as the axis along which the wave propagates. Sound waves are longitudinal waves, since the air molecules are displaced forward and backward on the same axis along which the sound travels. Compare transverse wave. See more at wave.