Dictionary.com

opioid

[ oh-pee-oid ]
/ ˈoʊ piˌɔɪd /
Save This Word!

noun Biochemistry, Pharmacology.

an opiate, or any similar synthetic compound: formerly referring only to the latter, but now the predominant term for both the opium-derived and synthetically produced substances: Illicit use of the synthetic opioid fentanyl is on the rise.The opium poppy is the source for all natural opioids.
any opiumlike substance: Have any opioids been detected in poppies that do not contain opium?
any of a group of natural substances, as the endorphins, produced by the body in increased amounts in response to stress and pain.

adjective

pertaining to such a substance: opioid drugs such as heroin and oxycodone;opioid neuropeptides.

QUIZZES

QUIZ YOURSELF ON THE MANY TYPES OF NOUNS

They're everywhere you turn, but can you identify the 10 types of nouns easily? This quiz will test your mettle against singular, plural, concrete, abstract, common, proper, collective, compound, countable, and uncountable nouns!
Question 1 of 7
Shoelaces, rainbow, toothpaste, and haircuts are all what type of noun?

Meet Grammar Coach

Write or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing

Meet Grammar Coach

Improve Your Writing
Write or paste your essay, email, or story into Grammar Coach and get grammar help

Origin of opioid

First recorded in 1955–60; opi(um) + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for opioid

British Dictionary definitions for opioid

opioid
/ (ˈəʊpɪˌɔɪd) /

noun

  1. any of a group of substances that resemble morphine in their physiological or pharmacological effects, esp in their pain-relieving properties
  2. (modifier) of or relating to such substancesopioid receptor; opioid analgesic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for opioid

opioid
[ ōpē-oid′ ]

n.

opiate

adj.

Opiate.

Other words from opioid

opi•oid′ adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
FEEDBACK