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- Water under pressure when tapped by a well and able to rise above level at which first encountered. It may or may not flow out at ground level.
Source: Leet, L. Don. 1982. Physical Geology, 6th Edition. Englewood Cliffs, NJ: Prentice-Hall
- Ground water that is under sufficient pressure to rise above the level at which it is encountered by a well, but that does not necessarily rise to or above the surface of the ground. AGI
- Ground water that is confined within a permeable bed and that rises under pressure to approx. the height of the intake. If the outlet (well or spring) is appreciably below the height of the intake, the water will flow out under pressure. If even with or above the height of the intake, the water will rise in the well but it will not flow out. Bateman, 2
Source: Dictionary of Mining, Mineral, and Related Terms