bicep
n. countable B1 Intermediate US //ˈbaɪˌsɛp// UK //bˈaɪsəp// bi·cep
n. the large muscle on the front of your upper arm. It gets bigger when you lift things or do exercises like curls.
n. the large muscle on the front of the upper arm, responsible for flexing the elbow. Often used in the plural to refer to the pair of muscles in both arms.
He did ten bicep curls to build his arm muscles.
After carrying the heavy boxes up the stairs, his bicep felt sore and tired.
The athlete's well-defined bicep was a testament to years of rigorous weight training and a strict nutritional regimen designed to maximize muscle hypertrophy.
Back-formation from biceps. In Latin, biceps is singular.