For Zone of Aeration we have terms and definitions in 2 topics. The topics are Physical Geography and Plumbing.

Horizontal zone that extends from the top of the water table to the ground surface. Soil and rock pore spaces in this zone may and may not have water.
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The layer in the ground above the water table where the available voids are filled with air. Water falling on the ground percolates through this zone on its way to the aquifer.
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