artesian well

UK: /ɑːˈtiːzɪən/ US: /ɑrˈtiʒən ˈwɛl/

WordReference Random House Learner's Dictionary of American English © 2025

ar•te•sian well /ɑrˈtiʒən ˈwɛl/  n. [countable]

1. Geology a well in which water rises under pressure without being pumped.

WordReference Random House Unabridged Dictionary of American English © 2025

arte′sian well′, 

1. Geology a well in which water rises under pressure from a permeable stratum overlaid by impermeable rock.

• 1855–60

Collins Concise English Dictionary © HarperCollins Publishers::

artesian well / ɑːˈtiːzɪən -ʒən/ noun

1. a well sunk through impermeable strata into strata receiving water from an area at a higher altitude than that of the well, so that there is sufficient pressure to force water to flow upwards

Etymology: 19th Century: from French artésien, from Old French Arteis Artois, old province, where such wells were common