iliocostalis
noun
il·io·cos·ta·lis
-käs-ˈtā-ləs 
: the lateral division of the sacrospinalis muscle that helps to keep the trunk erect and consists of three parts:
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“Iliocostalis.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/iliocostalis. Accessed 22 Dec. 2024.
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