artesian well
noun1
An aquifer in which water rises to the surface under its own hydrostatic pressure.
- “When I say mind,” said the blood relation, “I refer to the quarter-teaspoonful of brain which you might possibly find in her head if you sank an artesian well.”1960, P[elham] G[renville] Wodehouse, chapter XVII, in Jeeves in the Offing, London: Herbert Jenkins, →OCLC:
2
A borehole in an artesian basin.