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 outer layer of an internal organ or body structure, such as the kidney or the brain.
The medulla oblongata.
The soft inner part of something, especially the pith of a fruit.
The internal tissue of a plant.
The inner substance of various organs and structures, especially the marrow of bones.