endorphin
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.”
How to use endorphin
Learner’s notesIn plain EnglishA natural brain chemical linked to pain relief and good feelings.
It is used in both everyday talk and scientific writing, usually in the plural.
The word is usually plural when people talk about exercise and mood.
Trace the full origin ↓Fill the gap
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.