- back, dorsum - the posterior part of a human (or animal) body from the neck to the end of the spine; "his back was nicely tanned"
--1 is a kind of body part
--1 is a part of torso, trunk, body
--1 has parts:saddle; small; latisimus dorsi, lat; thoracic vertebra, dorsal vertebra; lumbar vertebra - 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); "the dorsum of the foot"
--2 is a kind of body part