the region of the chest wall over the lower part of the body of the sternum, where the sounds produced at the tricuspid valve are heard most distinctly.
Etymology: Gk, treis, three; L, cuspis, point
the region of the chest near the left lower sternum and opposite the fourth and fifth costal cartilages, where sounds of the tricuspid heart valve are best heard by auscultation. Also called tricuspid-valve area.
The lower portion of the body of the sternum where sounds of the right atrioventricular orifice are best heard.