In a chemical analysis, the measured value that is obtained in the absence of a specified component of a sample and that reflects contamination from sources external to the component; it is deducted from the value obtained when the test is performed with the specified component present. Also known as analytical blank.

See <<bit blank>>

To cut off the electron beam of a television picture tube, camera tube, or cathode-ray oscilloscope tube during the process of retrace by applying a rectangular pulse voltage to the grid or cathode during each retrace interval. Also known as beam blank.

1. The result of the final cutting operation on a natural crystal.

2. See <<blind>>

1. A semifinished piece of metal to be stamped or forged into a tool or implement.

2. A semifinished, pressed, compacted mass of powdered metal.

3. Metal sheet prepared for a forming operation.

Ammunition which contains no projectile but which does contain a charge of low explosive, such as black powder, to produce a noise.