Any of the coronary vessels; a coronary artery or coronary vein.
A small bone in the foot of a horse.
Encircling something (like a crown), especially with regard to the arteries or veins of the heart.
Thrombosis of a coronary artery, that is, a blockage, caused by a blood clot, of the blood flow in a coronary artery of the heart, leading to myocardial infarction.