For Vadose Zone we have terms and definitions in 2 topics. The topics are Environment and Speleological.

The zone between land surface and the water table within which the moisture content is less than saturation (except in the capillary fringe) and pressure is less than atmospheric. Soil pore space also typically contains air or other gases. The capillary fringe is included in the vadose zone. (See
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That part of the cave environment that lies or once lay above the water table. Also refers to the erosional processes that act in that zone. See Unsaturated zone.
Speleology term.
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