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| the offspring of a zebra and a donkey. |
| a stew of meat, vegetables, potatoes, etc. |
| control group | |
| —n | |
| 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 | |
| Main Entry: | control group |
| Part of Speech: | n |
| Definition: | 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: | medicine |
control group n.
A group used as a standard of comparison in a control experiment.