vadose
Concise Oxford English Dictionary © 2008 Oxford University Press:
vadose /ˈveɪdəʊs/
▶adjective Geology relating to or denoting underground water in the zone above the water table. Compare with phreatic.
– origin C19: from L. vadosus, from vadum ‘shallow expanse of water’.
'vadose' also found in these Oxford entries:

