'Dorsum' definitions:

Definition of 'dorsum'

From: WordNet
noun
The posterior part of a human (or animal) body from the neck to the end of the spine; "his back was nicely tanned" [syn: back, dorsum]
noun
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); "the dorsum of the foot"

Definition of 'Dorsum'

From: GCIDE
  • Dorsum \Dor"sum\, n. [L.]
  • 1. The ridge of a hill. [1913 Webster]
  • 2. (Anat.) The back or dorsal region of an animal; the upper side of an appendage or part; as, the dorsum of the tongue. Dortour