The artificial heart, a mechanical heart replacement, is typically used in order to bridge the time to heart transplant or to replace the heart in case a transplant is impossible. Often ventricular assist devices are confused with mechanical hearts because the assist the heart through pumps. They are also different from a cardiopulmonary bypass machine which is an external device used to provide the function of the heart and lungs. CPBs are usually only used for a few hours at a time,...
- The navel or umbilicus.
- In Greek archaeology: A central boss, as on a shield, a bowl, etc.
- A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.