n :  a branch of the internal thoracic artery that gives off branches to the seventh, eighth, and ninth intercostal spaces as anterior intercostal arteries, to the pericardium, to the diaphragm, and to the abdominal muscles - called also musculophrenic , musculophrenic branch  .
 
 
 
Published under license with Merriam-Webster, Incorporated.  © 1997-2024.