Not quite right?
"Search similar patterns."
F_______
Definitions
a mixture of gases (mostly methane) that form in coal mines and become explosive when mixed with air
Word origin
From fire + damp with 'damp' not in the usual sense of 'moist' but old German, modern Dutch, Danish 'damp' as steam or vapour, hence a gas liable to catch fire.
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
No curated clues for firedamp yet.