xiphisternum Syllabification: (xiph·i·ster·num)Pronunciation: /ˌzifəˈstərnəm/Definition of xiphisternum noun Anatomy the lowest part of the sternum; the xiphoid process. Origin: mid 19th century: from Greek xiphos 'sword' + sternumxiphisternum in other Oxford dictionaries Definition of xiphisternum in the British & World English dictionary
