A geological or medical term referring to hidden seepage, infiltration, or the concealed flow of fluids through soil, rock, or tissue.
From 'crypto-' (hidden) and Greek 'rhesis' (flow), describing hidden fluid movement that occurs without obvious visible signs or pathways.
Hydrogeologists use this term to describe groundwater secretly seeping through rock layers where you can't see it—it's how aquifers move water underground and stay hidden from our view.
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