GUDGEON

n. 1 any of various kinds of pivot working a wheel, bell, etc. 2 the tubular part of a hinge into which the pin fits to effect the joint. 3 a socket at the stern of a boat, into which a rudder is fitted. 4 a pin holding two blocks of stone etc. together. øgudgeon-pin (in an internal-combustion engine) a pin holding a piston-rod and a connecting-rod together. [ME f. OF goujon dimin. of gouge GOUGE]