Either of the large, flat, triangular bones that lie against the ribs in the upper back and provide attachments for the bone and muscles of the upper arm. Also called scapula.
- As you row, pinch your shoulder blade toward the midline of your body and slightly rotate your torso.
- When your upper arm moves, your shoulder blade almost always has a corresponding movement.
- The main shoulder joint is formed by the arm bone and the shoulder blade.
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Syllabification: shoul·der blade
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