(in an experiment) The group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects in order to validate the results of the test.

(UK, law) An order made by the Home Secretary to restrict an individual's liberty for the purpose of protecting members of the public from a risk of terrorism.

A device which controls the temperature and relative humidity in cars, buildings, etc, by way of a heating and/or air conditioning system.

plural of control order

plural of control pad

Subject to rent control.

Synonym of d-pad

The number of subordinates directly reporting to a supervisor.

plural of fuzzy controller

(railways) A non-powered railroad car from which the train may be controlled - equipped with a driver's cabin, front lights and other equipment required for a locomotive, located at the end of the train opposite to that of the locomotive. This arrangement allows the train to be safely driven into both directions at full speed without changing the configuration of the train.