- 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.
[French, gaseous exhalation, from Italian moffetta, diminutive of muffa, mold, moldy smell, probably of Germanic origin.]
* Definition from The American HeritageÂ® Dictionary of the English Language, Fourth Edition copyright Â©2000 by Houghton Mifflin Company. Updated in 2003. Published by Houghton Mifflin Company. All rights reserved.
Segment Producer: Beth Botshon