- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a wave that is propagated in the same direction as the displacement of the transmitting mediumCompare transverse wave
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