firedamp firedamp  /ˈfaɪ ər ˌdæmp/

Definition(s):

  • (n) a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air

Usage(s):

  • Live canaries, which used to be carried down into coal mines as sentinels against firedamp, are not often stationed in modern chemical laboratories.
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exhaustive exhaustive
/ɪɡ ˈzɔ stɪv /