an electric toy racing car (often a model of a real racing car) that fits into a slotted racing track by means of a pin or blade; the electric motor of each car is controlled by a handheld device operated by each player, as they race their cars against each other
slot car in American English
US
a plastic, electrically driven, miniature car, built to exact scale and raced as a game against other such cars over a slotted track: each car is remotelycontrolled by a hand-held rheostat