The back or upper side of an organism, especially an animal. The dorsum of the dolphin is typically a darker shade than its belly.
The back of the human body. The massage therapist focused on relieving tension in the dorsum.
The upper surface of a part of the body, such as the tongue or foot. The doctor examined the dorsum of the patient's tongue for any abnormalities.
A low, typically sinuous wrinkle ridge on the surface of a planetary body, especially on the Moon or Mars. The rover photographed the undulating crest of Dorsum Owen as it drove across the lunar mare.