bicep
USBY-sep/ˈbaɪsɛp/
Pluralbiceps
- 1The big muscle on the front of your upper arm.
Like a thick rubber band that pulls your lower arm up when it tightens.
He flexed his bicep to show off after the workout.
Her biceps were sore after she carried heavy boxes up the stairs.
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Origin
It comes from the word "biceps." People thought "biceps" was plural, so they made "bicep" for one muscle. But in Latin, "biceps" is already singular.