control group: Meaning and Definition of

control' group"

Pronunciation: [key]
  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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
control freak controllable-pitch
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