chokedamp
/ˈtʃoʊkˌdæmp/
noun
- A gas in a mine that does not support life and can cause suffocation, mainly carbon dioxide.
- Miners used to carry canaries to detect chokedamp before it became dangerous.
- Chokedamp can build up in poorly ventilated underground tunnels.
- The rescue team wore breathing apparatus to protect against chokedamp in the collapsed shaft.