| overhead camshaft | |
| —n | |
| a type of camshaft situated above the cylinder head in an internal-combustion engine. It is usually driven by a chain or a toothed belt from the crankshaft and the cams bear directly onto the valve stems or rocker arms | |
| a fool or simpleton; ninny. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |