Glossary O

Glossary O

Opioid is defined as a chemical such as opium, heroin, and other molecules with related structures that reduce pain and induce feelings of euphoria.

Opioid are systems responsive to opiate drugs and similar chemicals

opioid use disorder refers to cognitive, biological, behavioral, and social problems associated with the use and abuse of opiates and their synthetic variants.

Opioids are substances that include morphine and heroin, producing euphoria followed by a tranquil state; in severe intoxication, can lead to unconsciousness, coma, and seizures; can cause withdrawal symptoms of emotional distress, severe nausea, sweating, diarrhea, and fever

Opium refers to the dried sap produced by the poppy plant

Opium poppy is a plant cultivated for centuries, primarily in Eurasia, for Opium, a narcotic that acts as a central nervous system depressant

OPO refers to an organ procurement organization; one of the authorized local or regional agencies that implements procedures to offer the opportunity of organ donation and to recover donated organs

Opponent neurons is a neuron that has an excitatory response to wavelengths in one part of the spectrum and an inhibitory response to wavelengths in the other part of the spectrum.