dorsum
noun [ C ] anatomy specialized uk/ˈdɔː.səm/ us/ˈdɔːr.səm/ dorsa /ˈdɔː.sə/ /ˈdɔːr.sə/
(拉丁语）背，背部，背面（用于医学术语中)
a Latin word meaning "back", used in medical names and descriptions of the back or top surface of an organ
the dorsum of the foot 足背