costarum
Costarum is the genitive plural form of the Latin word costa, meaning rib. In anatomy, costarum appears in Latinized compound terms to indicate a relation to or association with the ribs. It is commonly seen in descriptors such as incisurae costarum (notches of the ribs) or foramina costarum (costal foramina), where the genitive plural specifies the ribs involved.
Etymology and grammar: Costa is a first-declension noun meaning rib. Its forms include nominative costa, genitive
Usage and scope: In modern anatomy, terms containing costarum are primarily found in historical texts, in scholarly
See also: costa (rib), costa anatomica, anatomical terminology, Terminologia Anatomica.