a vent or fissure in an area of recent volcanic activity, emitting steam, carbon dioxide, and, sometimes, other gases
Origin of mofetteFrench ; from Italian muffare, to be moldy ; from German muff, mold
- An opening in the earth from which carbon dioxide and other gases escape, usually marking the last stage of volcanic activity.
- The gases escaping from such an opening.
Origin of mofetteFrench, gaseous exhalation, from Italian moffetta, diminutive of muffa, mold, moldy smell, probably of Germanic origin.