dorsum (n.)

  1. 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 ]

  2. 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'

The dictionary is based on the WordNet Electronic Lexical Database.
WordNet 3.0 Copyright 2011 by Princeton University. All rights reserved.