Periphery

Generally, a periphery is a boundary or outer part of any space or body. It is derived from the Greek word περιφέρεια, meaning a circumference or outer surface.

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• In biology, the periphery of the body is the part that is away from the central or core regions.
• For example, the peripheral nervous system is distinct from the central nervous system.
• See also peripheral membrane protein.
• Peripheral vision is that part of visual perception that occurs in the periphery, i.e., near the edges, of the field of view.
• In computer hardware, a peripheral is added to a host computer in order to expand its abilities. This is not to be confused with a peripheral device.
• For peripheral submanifolds in mathematics, see boundary parallel.
• The Periphery includes nations that are not core countries - capitalist or industrialized nations. See Immanuel Wallerstein, Third World.
• The 13 peripheries of Greece are subnational subdivisions of that country.
• In BattleTech game, the Periphery is the region filled with less developed space colonies, most distant from Earth.