Medical Dictionary

longissimus

noun lon·gis·si·mus \län-ˈjis-i-məs\
plural lon·gis·si·mi \-ˌmī\

Medical Definition of LONGISSIMUS

:  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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