artesian well artesian well /ɑrˈtiʒən wɛl/

noun

1. A well drilled through impermeable strata into strata that receive water from a higher altitude so there is pressure to force the water to flow upward  ( artesian well )
   a well drilled through impermeable strata into strata that receive water from a higher altitude so there is pressure to force the water to flow upward