opioid

[ oh-pee-oid ]
/ ˈoʊ piˌɔɪd /
|

noun Biochemistry, Pharmacology.

any opiumlike substance.
any of a group of natural substances, as the endorphins, produced by the body in increased amounts in response to stress and pain.
any of several synthetic compounds, as methadone, having effects similar to natural opium alkaloids and their derivatives.

adjective

pertaining to such a substance.

Origin of opioid

First recorded in 1955–60; opi(um) + -oid
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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

Medicine definitions for opioid

opioid

[ ōpē-oid′ ]

n.

opiate

adj.

Opiate.

Related forms

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