English word opioid comes from English opium, English -oid
| Dictionary entry | Language | Definition |
|---|---|---|
| opium | English (eng) | (countable) Anything that numbs or stupefies.. (uncountable) A yellow-brown, addictive narcotic drug obtained from the dried juice of unripe pods of the opium poppy, Papaver somniferum, and containing alkaloids such as morphine, codeine, and papaverine. |
| -oid | English (eng) | Of similar form to, but not the same as. Having the likeness of. Forms adjectives and nouns. |
| opioid | English (eng) | (pharmacology) Any of a group of synthetic compounds that exhibit similarities to the opium alkaloids that occur in nature.. (physiology) Any of the natural substances, such as an endorphin, released in the body in response to pain.. A substance that has effects similar to opium. |