Dorsal (adjective)

1. Of, on, or relating to the back or upper surface of an organism or body part.
2. Situated on or at the back of an organism or body part.

Origin:

Early 18th century: from latin dorsum "back".

Examples:

1. The dorsal fin of a shark is a triangular fin located on its back.
2. The dorsal surface of the hand is the back of the hand.
3. The dorsal muscle is the muscle located on the back of the body.
4. The dorsal root of a spinal nerve is the root that emerges from the back of the spinal cord.
5. The dorsal view of a fish or amphibian is the view of the upper surface.