noun: Alternative form of roll bar (“an anti-roll bar”) [A strong U-shaped bar fastened to the frame of a vehicle, such as an off-road vehicle or a race car to protect the driver and passengers from being crushed in the event that the vehicle rolls over.]
noun: Alternative form of roll bar (“U-shaped bar for vehicle safety”) [A strong U-shaped bar fastened to the frame of a vehicle, such as an off-road vehicle or a race car to protect the driver and passengers from being crushed in the event that the vehicle rolls over.]
