Sōl'fa-tā'rā, n.

n. [From the volcano near Naples, from It. solfo, Lat. sulfur, brimstone, sulphur. Cf. Fr. soufrière, a sulphur-mine, from soufre, sulphur.] (Geol.) A volcanic vent or area, from which sulphur, sulphureous, watery, and acid vapors and gases are emitted. Lyell.