- a reaction to a placebo manifested by a lessening of symptoms or the production of anticipated side effects.
Origin of placebo effect
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- med a positive therapeutic effect claimed by a patient after receiving a placebo believed by him to be an active drugSee control group
- A beneficial effect in a patient following a particular treatment that arises from the patient's expectations concerning the treatment rather than from the treatment itself.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.