Placebo /(?)/

Pla·ce·bo

Placebo

n.
  1. The first antiphon of the vespers for the dead. (R. C. Ch.)
  2. A prescription with no pharmacological activity given to a patient to humor or satisfy the desire for medical treatment. (Med.)
  3. a dose of a compound having no pharmacological activity given to a subject in a medical experiment as part of a control experiment in a test of the effectiveness of another, active pharmacological agent. (Med.)

Phrases & Compounds
To sing placebo
to agree with one in his opinion; to be complaisant to.