What is the meaning of Fumarola?

fumarole (an opening in the ground that emits steam and gases due to volcanic activity)

fumarole (opening in the ground that emits gases)

smoker (hydrothermal vent on the seabed)

fumarole

fumarole (opening in the ground that emits gases)

fumarole (opening in the ground that emits gases)

Source: wiktionary.org