Contact

contact

A metal strip in a switch or socket that touches a corresponding strip in order to make a connection for current to pass. Contacts may be made of precious metals to avoid corrosion.

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contact

1. 

a. a junction of two or more electrical conductors

b. the part of the conductors that makes the junction

c. the part of an electrical device to which such connections are made

2. any person who has been exposed to a contagious disease

3. an informal name for contact lens

4. of or relating to irritation or inflammation of the skin caused by touching the causative agent

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contact [′kän‚takt]

(electricity)

electric contact

(engineering)

Initial detection of an aircraft, ship, submarine, or other object on a radarscope or other detecting equipment.

(fluid mechanics)

The surface between two immiscible fluids contained in a reservoir.

(geology)

The surface between two different kinds of rocks.

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contact

A part which is an electric conductor and which provides a low-resistance path for current flow upon mating with another conducting part with which it is designed to operate.

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Contact 

the geometric concept signifying that at a certain point, two curves (or a curve and a surface) have a common tangent line or two surfaces have a common tangent plane. The order of contact is a characteristic of the proximity of two curves (a curve and a surface, or two surfaces) in the neighborhood of their common point.