1) Curved motorcycle part 2) Fender 3) Shield behind a wheel 4) Splash guard 5) Splash protector 6) Splash-guard 7) Wing 
[n] - a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels
splash guard noun a curved piece above the wheel of a bicycle or motorcycle to protect the rider from water or mud thrown up by the wheels
splash guard. · fender (def. 3).