bicep
nounUK /ˈbaɪ.sep/
US /ˈbaɪ.sep/
The muscle on the front of your upper arm that helps you bend your elbow.
He flexed his bicep to show how strong he was.
OTHER MEANINGS
2. The large muscle at the back of the upper arm (often called the biceps in everyday speech).
She felt sore in her bicep after lifting weights.
3. A muscle with two points of attachment, especially in the arm or leg.
The doctor explained how the bicep works during movement.
4. Informal term for arm strength or muscle size.
He's been working on his bicep at the gym.