from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See blackdamp.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A damp consisting chiefly of carbon dioxide, so called for its ability to asphyxiate.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life


So called because it causes suffocation in mines.
(American Heritage® Dictionary of the English Language, Fourth Edition)
choke +‎ damp (Wiktionary)



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