Eustachian

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Eustachian \Eu*sta"chi*an\, a. [From Eustachi, a learned Italian
     physician who died in Rome, 1574.] (Anat.)
     (a) Discovered by Eustachius.
     (b) Pertaining to the Eustachian tube; as, Eustachian
         catheter.
         [1913 Webster]


  
     {Eustachian catheter}, a tubular instrument to be introduced
        into the Eustachian tube so as to allow of inflation of
        the middle ear through the nose or mouth.
  
     {Eustrachian tube} (Anat.), a passage from the tympanum of
        the ear to the pharynx. See {Ear}.
  
     {Eustachian 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.
        [1913 Webster]