body wave

noun

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

1. 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.