1. A stiff or bony formation in an internal organ; such as, the cartilaginous rings in the trachea and other parts of the breathing system:The visceroskeleton in Mrs. Sam's throat seemed constricted and she required exploratory surgery to determine how best to repair the condition.
2. Bone structures of the skeleton which protect body parts in the abdomen and lung area of the body: As a result of the three-car collision, Mark suffered extensive damage to his visceroskeleton, including a broken hip and several ribs.