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noun

endorphin

en-DOR-fin
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Endorphin (noun) means a chemical made in the brain that acts as a messenger between nerve cells and has effects similar to morphine. Example: “Many runners say exercise releases endorphins that lift their mood.”

noun
1
A chemical made in the brain that acts as a messenger between nerve cells and has effects similar to morphine.
"Many runners say exercise releases endorphins that lift their mood."
"Endorphins help the body cope with pain."
"She felt a rush of endorphins after the long hike."

How to use endorphin

Learner’s notes

In plain EnglishA natural brain chemical linked to pain relief and good feelings.

When to use it

It is used in both everyday talk and scientific writing, usually in the plural.

Memory tip

The word is usually plural when people talk about exercise and mood.

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Common pairings
release endorphins endorphin rush boost endorphins natural endorphins
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Can you complete this real example?

Many runners say exercise releases _____ that lift their mood.

Etymology

The word was borrowed from French endorphine, which combined the start of endogène, meaning produced within, with morphine.

Origin: French

Frequently asked questions

What is an endorphin?
An endorphin is a peptide hormone found in the brain of mammals that acts as a neurotransmitter and works somewhat like morphine.
Where does the word endorphin come from?
It comes from French endorphine, formed from a word meaning produced within and the word morphine.
How do you pronounce endorphin?
In American English it is said en-DOR-fin, with the stress on the second syllable.
What is the meaning of endorphin?
"endorphin" (noun) means a chemical made in the brain that acts as a messenger between nerve cells and has effects similar to morphine.