from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. choke damp
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
black + damp, gas.(American Heritage® Dictionary of the English Language, Fourth Edition)
Of course Dr. Plimer's book has been pretty thoroughly reviewed by now and it has not stood up well (in fact I would venture that it is currently comatose on the floor from a case of blackdamp!).