shoulder blade
US /ˈʃoʊl.dər bleɪd/
UK /ˈʃoʊl.dər bleɪd/
1.
either of the two large, flat, triangular bones at the top of the back, below the neck, that connect the upper arm bone to the collarbone
:
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He felt a sharp pain in his left shoulder blade.
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The massage therapist worked on the knots in her shoulder blades.