WordNet (r) 3.0 (2006):
coronary bypass surgery n 1: open-heart surgery in which the rib cage is opened and a section of a blood vessel is grafted from the aorta to the coronary artery to bypass the blocked section of the coronary artery and improve the blood supply to the heart [syn: coronary bypass, coronary bypass surgery, coronary artery bypass graft, CABG]