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| a scrap or morsel of food left at a meal. |
| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| placebo effect | |
| —n | |
| med See control group a positive therapeutic effect claimed by a patient after receiving a placebo believed by him to be an active drug | |
placebo effect n.
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.