I. dorsal
variant of dossal
II. dor·sal ˈdȯr-səl adjective
Etymology: Late Latin dorsalis, from Latin dorsum back
Date: 1727
1. : relating to or situated near or on the back especially of an animal or of one of its parts
2. : abaxial
• dor·sal·ly -sə-lē adverb
III. dorsal noun
Date: 1834
: a dorsally located part ; especially : a thoracic vertebra