Excavation at the base of a slope that results in the formation of an overhang.

The removal of material at the base of a steep slope or cliff by the erosive action of waves, running or seeping water, or windblown sand.

Where the river is flowing fast around an outside bend and erodes the bank to create a steep bank. The opposite of the slip-off slope.

the lateral etching into a substrate under a resistant coating, as at the edge of a resist image.

The lateral etching into a substrate under a film resist coating.

The technique of decorating glass in high relief by cutting away part of the glass between the body of an object and its decoration (e.g., on a cage cup).