EARTH SCIENCE > OCEANS > OCEAN WAVES > SEICHES
Pendulum-like rocking of water in an enclosed area; a form of standing
wave that can be caused by meteorological or seismic forces, or that may
result from normal resonances excited by tides.
Garrison, T. 1993. Oceanography, an Invitation to Marine Science. Wadsworth
Publishing Co. p. 526.