opioid
- Noun. A substance that is like opium.
- Noun. (physiology) Any of the natural substances, such as an endorphin, released in the body in response to pain.
- Noun. (pharmacology) Any of a group of synthetic compounds that exhibit similarities to the opium alkaloids that occur in nature.
- Adjective. Pertaining to opioids.
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This entry was last updated on RefTopia from its source on 3/20/2012.