The outside or superficial portions of a body; the surface.

The extreme outer edge of part or drawing.

In vision, the area toward the outside of the retina that has a high concentration of rods, is sensitive to dim light, and is responsible for colorless sensations.

That part of an organ on the outside, away from the centre

Wallerstein's term for poor countries, far from the centre of international trade

outer part or a surface of the body; part away from the center

This is something that is on the edge. It therefore is used to refer to countries that are located far from the center of the world's economic activity.

on the edge or extra to the central idea or exterior to the main machine She was old, poor and on the periphery of society. peripheral (adj), peripherally (adv)

the outside boundary or surface of something

an external boundary, the outside edge of something

The edges of an awareness cluster, things and feelings that a human has a notion of but can not see clearly. This is not part of full awareness, not fixed in a pattern, and not accessible to off-set awareness, and yet still there in the cluster and having an influence on it.

Entire outside edge of an object or surface.

the outer areas on the front and back of a coin.

The periphery is the outermost part or region within a precise boundary.

An outside surface. An outer boundary.