A well or borehole into which air is sucked and from which air is blown (often with considerable velocity) due to changes in barometric pressure or in water level. The phenomenon indicates that the well or borehole is in communication with an underground airfilled cavity. Synonyms: (French.) puits souffleur; (German.) Windkamin; (Greek.) ekphysosa ope; (Italian.) pozzo soffiante; (Russian.) dujuscij kolodets; (Spanish.) sondeo soplador; (Turkish.) uflec kuyu. See also steam hole.