Function: noun
Date: 1942
: a wave (as a sound wave) in which the propagated disturbance is a variation of pressure in a material medium ― called also P-wave
Function: noun
Date: 1942
: a wave (as a sound wave) in which the propagated disturbance is a variation of pressure in a material medium ― called also P-wave
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012