Control-group
noun
1.
(in an experiment or clinical trial) a group of subjects closely resembling the treatment group in many demographic variables but not receiving the active medication or factor under study and thereby serving as a comparison group when treatment results are evaluated.
noun
1.
any group used as a control in a statistical experiment, esp a group of patients who receive either a placebo or a standard drug during an investigation of the effects of another drug on other patients
noun
in a test or trial, a group that does not receive the new treatment being studied and which is compared to the group that does receive the new treatment
Usage Note
medicine
control group n.
A group used as a standard of comparison in a control experiment.
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