Glossary of Karst and Cave Terms
Based on "A Lexicon of Cave and Karst Terminology with Special to Environmental Karst Hydrology" EPA/600/R-02/003, 2002, EPA: Washington, DC., Speleogenesis Glossary includes 2699 cave & karst terms
A stream or reach of a stream in which water flows from the stream bed into the ground . In karst terranes, losing streams may slowly sink into fractures or completely disappear down a ponor. Synonym: influent stream. See also ponor; stream sink.