This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A cylindrical, straight or curved steering bar, usually fitted with handles at each end, as on a bicycle. Often used in the plural.

n. The bar used to steer a bicycle, motorbike, or similar vehicle, usually used in the plural.

n. The curved bar connected by a shaft to the front wheel of a bicycle or motorcycle, positioned nearly horizontally in front of the rider's seat, designed to be gripped by the rider while riding, and used to steer the vehicle. Usually used in the plural.

n. In a bicycle or motor-cycle, the curved bar in front of the rider by which the vehicle is guided by the hands. In the motor-cycle many of the controlling devices are affixed to the handle-bar.

n. the shaped bar used to steer a bicycle

"Right below the handlebar was a small lever with R, N, D and L transmission settings."

bar   

handlebar moustache   

droopy    pencil-thin    gray-streaked    close-clipped    sidecar    throttle    headlight    walrus    salt-and-pepper    turned-up