A creatinine blood test measures the level of creatinine in the blood. Creatinine is a waste product that forms when creatine breaks down.Creatine is a substance found in muscle.Creatinine levels help determine how well your kidneys function. Your kidneys are responsible for eliminating creatinine from the body when you urinate. When creatinine levels increase, your kidney function may be impaired.reatinine is a waste product that forms when creatine breaks down. Creatine is a substance found in muscle. Creatinine levels help determine how well your kidneys function.
vertical centering control. (electronics). The centering control provided in a television receiver or cathode-ray oscilloscope to shift the position of the entire image vertically in either direction on the screen. 1  Facebook. 2  Twitter.
Woodworking Definition: OC (On-Center) Definition. The term ON-CENTER, which is often abbreviated OC, refers to measuring components of a woodworking or construction projects according to where the center of the stock's thickness falls. For instance, in framing a residential wall, a building plan may call for the wall studs to be placed every 16 inches OC against the floor plate and top plate.