1. A voltage-dependent variable resistor which is normally used to protect sensitive equipment from power spikes or lightning strikes by shunting the energy to the ground or a two-element semiconductor with nonlinear resistance in which the resistance drops as the applied voltage increases.
2. A blend of varied and resistor.

• Varied: That which changes periodically or in succession and differs or alternates.
• Resistor: An electrical component that limits or regulates the flow of electrical current in an electronic circuit and it can also be used to provide a specific voltage for an active device such as a transistor.