from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A sinkhole; a shakehole.
  • n. Water breaking in upon the miners at their work.

from the GNU version of the Collaborative International Dictionary of English

  • n. Water breaking in upon the miners at their work; -- so called among tin miners.


Compare German Schwall a sea swell, from schwellen to swell. See English swell. (Wiktionary)



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  • (n): a karst feature where surface water flows underground. Also swallow hole or ponor; stream or body of water at the point at which it enters a cave or cave system.

    "St Cuthbert's Swallet is a swallow hole or ponor, located prominently near Priddy in the area of the Priddy lead mining district. The water sinking in this area flows underground to Wookey Hole Cavern and re-emerges as river Axe. As a result mining activities at the lead mines coused(sic) pollution of the water which was used for the paper mill."

    January 15, 2009