1. (noun)back, dorsum the posterior part of a human (or animal) body from the neck to the end of the spine Synonyms: cover, dorsum, rear, spine, backbone, spinal column, back, vertebral column, binding, backrest, rachis, book binding
2. (noun)dorsum the back of the body of a vertebrate or any analogous surface (as the upper or outer surface of an organ or appendage or part) Synonyms: back
Synonyms and Antonyms of dorsum 
