ar ‧ te ‧ si ‧ an well /ɑːˌtiːziən ˈwel $ ɑːrˌtiːʒ ə n-/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: French ; Origin: artésien 'of Artois, area of northern France where such wells were first made' ]
a ↑ well from which the water is forced up out of the ground by natural pressure