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.
A layer of tissue.
One of several parallel horizontal layers of material arranged one on top of another.
A layer of sedimentary rock having approximately the same composition throughout.
Any of the regions of the atmosphere, such as the stratosphere, that occur as layers.
A class of society composed of people with similar social, cultural, or economic status.
A layer of vegetation, usually of similar height.
The level of accuracy of a computer's clock, relative to others on the network.