Os scaphoideum is a bone in the wrist commonly known as the scaphoid bone. It is an essential part of the carpal bones, which are critical in hand movements and wrist stability. Other synonyms for the term os scaphoideum include navicular bone, carpal scaphoid bone, and wrist bone. It is important to note that this bone is often susceptible to fractures, and early detection of such injuries can prevent long-term complications. Proper care and treatment, including immobilization and proper rehabilitation, can help patients regain their wrist's full range of motion, strength and functionality.