Dorsum

The dorsum refers to the back or posterior surface of various body parts, such as the hand and foot.

In human anatomy, it most commonly describes the dorsal side (back) of structures like fingers, toes, vertebrae, and other bones. The term is particularly useful in distinguishing anatomical surfaces where the ventral (frontal) aspect would be considered separately.

The Latin origin (dorsum meaning "back") makes this a classical anatomical descriptor used consistently across medical terminology to describe orientation or position of body parts relative to their front-back axis.