Axial Symmetry : The symmetry that describes a three-dimensional configuration which is the same in every plane containing the axis of symmetry. In cylindrical coordinates this implies independence of the azimuthal coordinate
Intergovernmental Oceanographic Commission IOC technical series 37, Tsunami Glossary (A glossary of terms and acronyms used in the tsunami literature - English), , United Nations Educational, Scientific and Cultural Organization UNESCO, Paris, France 1991. http://unesdoc.unesco.org/images/0008/000885/08853 8eb.pdf, (ND/ Tsunami Sci - Brit) {590}