O

O-Ring:

An elastomer gasket enabling a moisture seal, having a circular cross section. See Rubber.

Ohm:

Unit of electrical resistance. Resistance of a circuit in which a potential difference of one volt produces a current of one ampere.

Outer Conductor:

The external conductive member in a coaxial structure, such as the housing in a coaxial connector.

Overall Diameter:

Finished diameter over wire or cable.

Oxidation:

Oxidation can be considered the simple addition of oxygen to a metal, e.g., the addition of atmospheric oxygen to iron to form familiar rust. See Corrosion.