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A pin that attaches one end of a connecting rod to a wheel, crank, or piston. Also called gudgeon pin.
1. (Mechanical Engineering) a cylindrical boss or pin attached to the side of a wheel parallel with the axis, esp one forming a bearing for a crank
2. (Mechanical Engineering) US and Canadian the pin through the skirt of a piston in an internal-combustion engine, to which the little end of the connecting rod is attached. Also called (esp in Britain): gudgeon pin
a pin joining the end of a connecting rod to the end of a piston rod.