solfatara
/ˌsoʊlfəˈtɑrə/
noun
- A volcanic vent that emits only gases, especially sulfurous steam, with little or no lava.
- The hikers could smell rotten eggs near the solfatara in the volcano's crater.
- Scientists study solfataras to monitor volcanic activity.
- Yellowstone National Park has many solfataras that release hot sulfur gases.
Synonyms