phreatic

adjective phre·at·ic \frē-ˈa-tik\

Definition of PHREATIC

: of, relating to, or being groundwater

: of, relating to, or being an explosion caused by steam derived from groundwater

Greek phreat-, phrear well; akin to Armenian ałbiwr spring, Old High German brunno — more at burn

First Known Use: circa 1890

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