V-chip

noun
1.
a computer chip or other electronic device that blocks the reception of violent or sexually explicit television shows.
noun
1.
a device within a television set that allows the set to be programmed not to receive transmissions that have been classified as containing sex, violence, or obscene language

V-chip definition

A congressionally mandated embedded microchip for television sets that automatically blocks sexual or violent programming when activated.

Note: As of 2002, all TV sets sold in the United States contained a V-chip.