body wave

noun

Geology. a transverse or longitudinal earthquake wave that travels through the interior of the earth (distinguished from surface wave).
a permanent with little or no curl, designed to give fullness and body to the hair and to make it more manageable.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

body wave in Science

A seismic wave that travels through the Earth rather than across its surface. Body waves usually have smaller amplitudes and shorter wavelengths than surface waves and travel at higher speeds. Primary waves and secondary waves are body waves. Compare surface wave.