Definition of dorsum in English:
 dorsum
nounPlural dorsa ˈdɔːsəmˈdôrsəm
Anatomy Zoology The dorsal part of an organism or structure.
 Example sentencesExamples
-  Within 48 hours she developed well demarcated erythema over the front of her legs, and large blisters over each knee and the dorsum of her feet.
 -  The anterior tibial may become plexiform on the dorsum of the foot, giving rise to the dorsal intermetatarsals.
 -  It is the only muscle on the dorsum of the foot.
 -  Toothbrushing lasted for approximately five minutes after each meal and included brushing the teeth, the dorsum of the tongue, and the palatal and mandibular mucosa.
 -  A tooth typically penetrates the dorsum of the hand over the third MCP joint.
 
 Synonyms
backbone, spinal column, vertebral column, vertebrae
Origin
  
Late 18th century (denoting a long hill or ridge): from Latin, 'back'.