Opioid

Part of speech: noun

Pronunciation: /ˈəʊpiɔɪd/

Definitions

1. A category of pain-relieving medications that interact with specific brain receptors, potentially causing dependence and adverse effects
2. A type of pharmaceutical agent designed to manage pain by acting on certain neuroreceptors, which may also lead to addiction and withdrawal challenges
3. A classification of drugs that alleviate pain through interaction with particular receptors in the brain, often accompanied by the risk of addiction and adverse reactions

Etymology: The word "opioid" was first attested in 1963, and its history explains a distinction that most people never notice. It is built from "opium," the dried latex of the opium poppy, plus the suffix "-oid," from Greek "eidos," meaning "form" or "resemblance," so the literal sense is "opium-like." The suffix is the same one found in words such as "android," meaning "man-like." The coinage was deliberate. Its makers needed a way to separate drugs that were derived from opium, such as morphine and codeine, from the larger family of synthetic and semi-synthetic substances that acted on the same receptors in the body without any connection to the poppy. The older term "opiate" had been used for the natural alkaloids, so "opioid" was created to cover the wider group.

Synonyms: narcotic, painkiller