| 单词 | control group |
| 释义 | control groupnoun(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. Origin of control groupFirst recorded in 1950–55 Words nearby control groupcontrol electrode, control experiment, control freak, control freakery, control grid, control group, Control key, controllable-pitch, controlled, controlled experiment, controlled explosion Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for control group
British Dictionary definitions for control groupcontrol group nounany 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 Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for control groupcontrol group n.A group used as a standard of comparison in a control experiment. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
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