Definitions for opioidˈoʊ piˌɔɪd
Random House Webster's College Dictionary
any opiumlike substance, as the endorphins produced by the body or the synthetic compound methadone.
Category: Pharmacology, Biochemistry
(adj.)pertaining to such a substance.
Category: Physiology, Biochemistry, Pharmacology
Origin of opioid:
A substance that is like opium.
Any of the natural substances, such as an endorphin, released in the body in response to pain.
Any of a group of synthetic compounds that exhibit similarities to the opium alkaloids that occur in nature.
Pertaining to opioids.