Some sentence examples which use the word 'impermeable'
These are special organs which Lent~eIs interrupt the continuity of the impermeable layer of ordinary cork-cells.
An impermeable rock.
The clays of the Rolling Downs formation overlie a series of sands and drifts, saturated with water under high pressure, which discharges at the surface as a flowing well, when a borehole pierces the impermeable cover.