- a volcanic vent emitting only sulphurous gases and water vapour or sometimes hot mud
WordReference Random House Unabridged Dictionary of American English © 2026
sol•fa•ta•ra
(sōl′fə tär′ə, sol′-),USA pronunciation n. [Geol.]
sol′fa•ta′ric, adj.
- Geologya fumarole that gives off only sulfurous gases.
- Latin sulfur; see sulfur
- Italian (Neapolitan) solfatara, derivative of solfo
- 1770–80
Collins Concise English Dictionary © HarperCollins Publishers::
solfatara /ˌsɒlfəˈtɑːrə/ n