dorsum

dor·sum  (dôrsm)

n. pl. dor·sa (-s)

1. The back.

2. The upper, outer surface of an organ, appendage, or part: the dorsum of the foot.

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[Latin, back.]

Thesaurus

Noun	1.	dorsum - the posterior part of a human (or animal) body from the neck to the end of the spine; "his back was nicely tanned" back saddle - posterior part of the back of a domestic fowl body part - any part of an organism such as an organ or extremity torso, trunk, body - the body excluding the head and neck and limbs; "they moved their arms and legs and bodies" small - the slender part of the back lat, latissimus dorsi - a broad flat muscle on either side of the back dorsal vertebra, thoracic vertebra - one of 12 vertebrae in the human vertebral column; thoracic vertebrae extend from the seventh cervical vertebra down to the first lumbar vertebra lumbar vertebra - one of 5 vertebrae in the human vertebral column; lumbar vertebrae extend from the twelfth thoracic vertebra down to the sacral vertebrae
	2.	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" body part - any part of an organism such as an organ or extremity