Dictionary

1opioid

adjective opi·oid \ˈō-pē-ˌid\

Definition of OPIOID

1
:  possessing some properties characteristic of opiate narcotics but not derived from opium
2
:  of, involving, or induced by an opioid

First Known Use of OPIOID

1967

2opioid

noun

Definition of OPIOID

1
:  any of a group of endogenous neural polypeptides (as an endorphin or enkephalin) that bind especially to opiate receptors and mimic some of the pharmacological properties of opiates —called also opioid peptide
2
:  a synthetic drug possessing narcotic properties similar to opiates but not derived from opium; broadly :  opiate 1a

First Known Use of OPIOID

1967

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