opioid - What does it mean?
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Definition of 'opioid'Noun
( en-noun)
A substance that is like opium.
(physiology) Any of the natural substances, such as an endorphin, released in the body in response to pain.
(pharmacology) Any of a group of synthetic compounds that exhibit similarities to the opium alkaloids that occur in nature.
Hyponyms
* opiate
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