The hip bone or hip joint in humans and animals; the segment of an insect's leg closest to the body.
From Latin 'coxa' meaning hip or hip joint, directly adopted into anatomical terminology. The word has remained virtually unchanged since Roman times.
The coxa is surprisingly important in walking and running—it's where your leg connects to your pelvis, and any problem with your coxa (like arthritis or a fracture) can completely change how you move because you lose the rotational freedom that makes human gait so efficient.
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