opioid
opioid Lexical Profile
opioid Game Scores & Validity
• noun
Any of a class of natural, semi-synthetic, or synthetic substances that bind to specific receptors in the central nervous system to reduce pain, induce sleep, or produce euphoria.
"The physician prescribed a mild opioid to help manage the patient's severe post-surgical pain."
• adjective
Relating to, resembling, or acting as a substance that binds to the body's opium receptors to produce pain relief or narcotic effects.
"Researchers are investigating how endogenous opioid peptides regulate the human body's response to stress and pain."
Word Nuance & Usage
While often used interchangeably in casual speech, 'opiate' strictly refers to natural alkaloids derived directly from the opium poppy (such as morphine and codeine), whereas 'opioid' is a broader category encompassing natural opiates as well as semi-synthetic and fully synthetic drugs (such as oxycodone and fentanyl) that bind to the same brain receptors.
• Nearby Words
Word Origin & Etymology
Coined in the late 1950s by pharmacologist George H. Acheson from 'opium' (ultimately from Ancient Greek 'opion', meaning 'poppy juice') and the suffix '-oid' (meaning 'resembling').