Coaxial refers to a type of cable or connector that consists of an inner conductor surrounded by an insulating layer, which is then encased in an outer conductor. This design allows for the efficient transmission of electrical signals, minimizing interference and signal loss. Coaxial cables are commonly used in applications such as television broadcasting, internet connections, and radio communications. The term "coaxial" comes from the fact that the inner and outer conductors share a common axis. This configuration helps maintain a consistent impedance, which is crucial for high-frequency signal transmission. Coaxial cables are widely recognized for their durability and reliability in various electronic systems.