Main Entry: no·ce·bo

Pronunciation: \ˌnō-ˈsē-(ˌ)bō\

Function: noun

Inflected Form(s): plural no·ce·bos

Etymology: Latin, I will be harmful; after placebo

Date: 1961

: a harmless substance that when taken by a patient is associated with harmful effects due to negative expectations or the psychological condition of the patient