Definitions for opioidˈoʊ piˌɔɪd
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Random House Webster's College Dictionary
o•pi•oidˈoʊ piˌɔɪd(n.)
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:
1955–60
Wiktionary
opioid(Noun)
A substance that is like opium.
opioid(Noun)
Any of the natural substances, such as an endorphin, released in the body in response to pain.
opioid(Noun)
Any of a group of synthetic compounds that exhibit similarities to the opium alkaloids that occur in nature.
opioid(Adjective)
Pertaining to opioids.
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