blackdamp definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a suffocating gas, a mixture of carbon dioxide and nitrogen, that may occur in mines
blackdamp definition by American Heritage Dictionary
A noncombustible gas that consists of a mixture of carbon dioxide and nitrogen, found in mines after fires or explosions and incapable of supporting life. Also called chokedamp.
Origin: black + damp, gas.