Bounce:

Rebounding of moving contact from the fixed contact during contact transfer (during switch operation).

AC:

Alternating current; electric current that continually reverses direction at a fixed frequency (see VAC).

Brass:

An alloy of zinc and copper

Alloy:

A metal created by combining two or more metals to obtain a specific physical property

Break:

An interruption in a circuit. Denotes the number of pairs of separated contacts the switch introduces into each circuit it opens.