The crossword solution for the term 'eccentric wheel' is CAM, which stands for a camshaft. A camshaft is a cylindrical rod that is used to control the timing of the valves in an internal combustion engine. It is connected to the crankshaft and rotates at the same speed as the crankshaft. An eccentric wheel is a type of camshaft that has an off-center or irregular shape, which allows it to control the timing of the valves in a more precise manner.