ground water

the water beneath the surface of the ground, consisting largely of surface water that has seeped down: the source of water in springs and wells.

Origin of ground water

First recorded in 1885–90

The ground-water, instead of rising all through the winter, must have fallen lower and lower as the spring and summer advanced.

A History of Epidemics in Britain (Volume I of II) |Charles Creighton
The oxide zone of these deposits has no close relation to the present topography or to the present ground-water level.

The Economic Aspect of Geology |C. K. Leith
The ground-water is, therefore, relatively very high and the capacity of the soil for further absorption proportionately low.

Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 |Various
Gypsum is fairly soluble in ground-water, and sink-holes and solution cavities are often developed in gypsum deposits.

The Economic Aspect of Geology |C. K. Leith

The top surface of this zone is called the water table, or the ground-water level.

The Economic Aspect of Geology |C. K. Leith

ground water

underground water that has come mainly from the seepage of surface water and is held in pervious rocks