artesian
Concise Oxford English Dictionary © 2008 Oxford University Press:
artesian /ɑːˈtiːzɪən, -ʒ(ə)n/
▶adjective relating to or denoting a well that is bored perpendicularly into water-bearing strata lying at an angle, so that water is supplied by natural pressure.
– origin C19: from Fr. artésien, ‘from Artois’, a region in France.
'artesian' also found in these Oxford entries:

