longissimus

noun

lon·gis·si·mus län-ˈjis-i-məs

plural longissimi -ˌmī

: the intermediate division of the sacrospinalis muscle that consists of the longissimus capitis, longissimus cervicis, and longissimus thoracis

also : any of these three muscles

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longi

longissimus

longissimus capitis

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“Longissimus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/longissimus. Accessed 4 Nov. 2025.

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