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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