Opioid meaning

ō'pē-oid'
Opiate.
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Designating or of a group of natural or synthetic biochemicals, esp. endorphins, that relieve pain in the same way that opiates do.
adjective
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Any such biochemical.
noun
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Any of various compounds that bind to specific receptors in the central nervous system and have analgesic and narcotic effects, including naturally occurring substances such as morphine; synthetic and semisynthetic drugs such as methadone and oxycodone; and certain peptides produced by the body, such as endorphins.
noun
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A substance that is like opium.
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(physiology) Any of the natural substances, such as an endorphin, released in the body in response to pain.
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(pharmacology) Any of a group of synthetic compounds that exhibit similarities to the opium alkaloids that occur in nature.
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Origin of opioid

  • opi(um) –oid
    From American Heritage Dictionary of the English Language, 5th Edition
  • From opium +"Ž -oid.
    From Wiktionary