Meaning of the word "extensor muscle" in English

What does "extensor muscle" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

extensor muscle

US /ɪkˈstɛnsər ˈmʌsl/
UK /ɪkˈstɛnsə ˈmʌsl/

Noun

a muscle whose contraction extends or straightens a limb or other part of the body

Example:
The triceps is an extensor muscle of the elbow.
Weakness in the extensor muscles can lead to difficulty in straightening the fingers.