Calibration (noun)

1. The action or process of calibrating an instrument or experimental setup.
2. The accuracy of a measurement or instrument, typically measured against a standard.
3. The adjustment of a measuring instrument in order to be accurate.

Origin:

Early 17th century: from medieval latin calibratio(n-), from latin calibrat- "made level", from the verb calibrare, from calx, calc- "lime".

Examples:

1. The instrument needs to be calibrated before use.
2. The process of calibration ensures that the instrument is accurate.
3. Calibration of the scale was done using standard weights.
4. The calibration of the thermometer was checked against the National Institute of Standards and Technology standards.
5. The calibration of the equipment was done before the start of the experiment.