semiluna'ris

Tari'ni, velum meduUare poster i us. V. si'nus corona'rii [BNA], Thebes i an valve, coronary valve, an endocardial fold at the orifice of the coronary sinus in the right auricle (atrium) of the heart, v. splra'lis [BNA], valve of Heister, a series of crescentic folds of the mucous membrane of the cystic bile-duct, directed obliquely around the inner surface of the canal, v. tricuspid a'lis [BNA], tricuspid valve, right auriculoventricular valve, the valve closing the orifice between the right auricle (atrium) and ventricle of the heart; its three cusps are called anterior or infuridibular, right or marginal, and posterior or septal. V. vagi'nte, hytnen. v. ve'nte ca'vse inferior'is [BNA], valve of the inferior vena cava, Eustachian valve, an endocardial fold extending from the anterior inferior margin of the inferior vena cava to the anterior part of the limbus io e oval is. v. vestib'uli, one of two endocardial folds in the right fetal heart at the orifice of the saccus reuniens; from one are developed the V. sinus coronarii and the v. venae cavse inferior is.