dorsum
noun
dor·sum ˈdȯr-səm 
plural dorsa ˈdȯr-sə
1
: the upper surface of an appendage or part
2
: back
especially : the entire dorsal surface of an animal
Example Sentences
Recent Examples on the Web To make his mate more receptive in between bouts, a male N. pilipes will spread silk over her dorsum, or back, in massage-like motions known as mate binding. 
National Geographic, 14 Feb. 2017
National Geographic, 14 Feb. 2017 Word History
Etymology
Latin
First Known Use
1615, in the meaning defined at sense 1
Medical Definition
dorsum
noun
dor·sum ˈdȯr-səm
plural dorsa -sə
1
: the upper surface of an appendage or part
2
: back sense 1a
especially : the entire dorsal surface of an animal
- breaking out of
- breaking out with
- breaking piece
- breaking plow
- breaking point
- breaking points
- breaking strength
- breaking stress
- breaking the law
- breaking through
- breaking up
- breaking with
- breakings
- breakless
- breakneck
- breaknecker
- breakneckest
- breakoffs
- breakout
- breakout session
- breakout sessions
- breakouts
- breakover
- breakpointed
- breakpointing