DORSUM Meaning of DORSUM in English /dawr"seuhm/ , n. , pl. dorsa /-seuh/ . Anat., Zool.1. the back, as of the body. 2. the back or outer surface of an organ, part, etc. [ 1775-85; ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012