HYSTERESIS
Text: Non-uniqueness in the relationship between two variables as a parameter increases or decreases. In particular, the maximum difference in output at any given value of the measured variable within the specified range, when the value is approached first with an increasing signal and then with a decreasing signal. Also called DEADBAND, or that portion of a system's response where a change in input does not produce a change in output.
See Also:
Source: 100