Relating to or having two heads or origins; in anatomy, referring to muscles like the biceps that have two points of attachment or origin.
From 'bi-' meaning two, combined with 'capital' or Latin 'caput' meaning head. This anatomical term developed in medical terminology to describe muscles with two distinct origins.
Your biceps is actually short for 'biceps brachii'—a Latin phrase meaning 'two-headed arm muscle'—and when bodybuilders talk about peaks, they're literally referring to the two distinct muscle heads bulging!
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