A sharp edge or ridge formed by the intersection of two surfaces
A ridge formed on the surface of flaked stone, such as a arrowhead or hand axe, as the result of the intersection of two or more flake removals.
A sharp edge or ridge formed by the intersection of two curved surfaces
Buttocks, arse.
The edge, margin, or border of a steep place, as of a precipice; a bank or edge.
The edge or border.