water well

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water well

[′wȯd·ər ‚wel]
(civil engineering)
A well sunk to extract water from a zone of saturation.

well, wellhole

well, 1: W
1. The clear vertical space about which a stair turns; a stairwell.
2. The open vertical space between walls in which a stair or elevator is constructed.
3. Any enclosed space of small area but of considerable height, as an air shaft. well, 4.See bored well, dug well, etc.