Body waves
From Glossary of Meteorology
body waves
Waves that can exist within a solid or fluid body without boundary surfaces or interfaces.
Propagation of information and energy in such waves is generally possible in all radial directions, but may for some types of waves be influenced by forces of, for example, gravitation and rotation. In the ocean, the most common body waves are sound waves, light waves penetrating through the ocean surface, and internal gravitational waves.
