The outer layer of an internal organ or body structure, such as the kidney or the brain.
The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue.
The outer surface of a piece of flint.
The visible, external surface of a body.
The area of a two-dimensional surface.
The surface (of something immaterial, especially of the mind or soul).
A building intimately associated with the land on which it is built.