Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to Eustachian valve: thebesian valve
|(Anat.)||a crescent-shaped fold of the lining membrane of the heart at the entrance of the vena cava inferior. It directs the blood towards the left auricle in the fetus, but is rudimentary and functionless in the adult.|
See also: Eustachian
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.