tricep
nounUK /ˈtraɪ.sep/
US /ˈtraɪ.sep/
The muscle on the back of your upper arm that helps you straighten your elbow.
He felt his tricep working when he pushed the heavy door open.
OTHER MEANINGS
2. The large muscle at the back of the upper arm that has three parts.
The tricep has three heads that join together near the elbow.
3. A muscle used when you push or press something away from your body.
Doing push-ups makes your tricep stronger.
4. Informal short form of triceps brachii, the muscle group on the back of the arm.
She stretched her tricep after lifting weights.