Quadriceps (noun)

A large muscle located at the front of the thigh, which is responsible for extending the knee.

Origin:

From latin, meaning "four-headed muscle of the thigh".

Examples:

1. He strained his quadriceps while lifting weights.
2. Squats are a great exercise for building quadriceps strength.
3. She felt her quadriceps burning after the long hike.
4. The quadriceps is a muscle group that is commonly injured in athletes.
5. The quadriceps muscle is the largest muscle in the body.