superior posterior serratus muscle superior posterior ser·ra·tus muscle (sə-rā'təs)
n.
A muscle with origin in the spinous processes of the two lower cervical and two upper thoracic vertebrae, with insertion into the second to the fifth ribs, and with nerve supply from the first to the fourth intercostals.
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
| a fool or simpleton; ninny. |
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