(n.) Geophysics. A "wave" that propagates through a medium rather than along an interface. P-waves and S-waves are examples of body waves. See: dispersion, P-wave, S-wave, surface wave
Schlumberger Ltd. (The World's Leading Supplier Of Technology, Integrated Project Management And Information Solutions to Customers Working in The Oil and Gas Industry Worldwide), Schlumberger Oilfield Glossary Cedex, France 2014. http://www.glossary.oilfield.slb.com/en/Terms/sym/ a.aspx, (Ergo - Brit) {766}