1. A vent in the earth's crust, usually near a volcano, from which hot gases and steam are emitted.
Usage: geology; commonly used in volcanology and earth science

Examples

• The fumarole released sulfurous gases into the air.
• Scientists studied the fumaroles on the volcanic island to understand geothermal activity.
• Steam rose continuously from the fumarole near the crater.
• The fumarole's temperature exceeded 300 degrees Fahrenheit.
• Tourists were warned to stay away from the active fumaroles in the national park.
• Geologists use fumaroles to monitor volcanic activity and predict eruptions.