iliocostal muscle il·i·o·cos·tal muscle (ĭl'ē-ō-kŏs'təl)
n.
The lateral division of the erector muscle of the spine, having three subdivisions: the lumbar iliocostal muscle, the thoracic iliocostal muscle, and the cervical iliocostal muscle.
| a chattering or flighty, light-headed person. |
| a screen or mat covered with a dark material for shielding a camera lens from excess light or glare. |
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