| All-wheel drive | |
| A rotating part of a chef that is set off center of the axis; the part of a camshaft that operates the fuel pump. | |
| A cast iron disc mounted on the wheel hub, which is plant by the caliper disc brake pads to slow stop its rotation. | |
| Rate of the volume in the cylinder above the piston when the piston is at bottom dead center to the volume in the cylinder above the piston when the piston is at top dead center. |