Alternative term: Dead band
The range of values within which an input variable can be varied without initiating any noticeable change in the output variable. A dead zone may not be intentional. It may, for example, result from backlash or hysteresis.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Celsius (previously Centigrade)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM