A detrimental effect on health produced by psychological or psychosomatic factors such as negative expectations of treatment or prognosis.
- ‘Because of ethical concerns, nocebos are not commonly used in medical practice or research.’
- ‘Section Four, ‘Essays and Commentaries,’ examines aromatherapy and essential oils and homeopathy, the placebo effect, and herbs as a token and nocebos.’
- ‘It is also worth noting that the placebo has a negative counterpart - called a nocebo.’
1960s: from Latin, literally I shall cause harm from nocere, to harm on the pattern of placebo.