control group
noun
A group acting as a control in an experiment; especially a group of people participating in a study or trial who, typically without their knowledge, serve as a control by not being given the treatment being tested.
Origin
Late 19th century; earliest use found in Medical News.
- propensed
- propensitude
- propensity
- propensive
- propenyl
- propenylamine
- propeptide
- proper
- proper adjective
- Proper Bostonian
- properdin
- proper fraction
- properispome
- properispomenon
- proper law
- properly
- proper motion
- proper name
- properness
- proper noun
- Proper Preface
- Propertian
- propertied
- proper time
- Propertius, Sextus