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eustachian


eustachian

 

  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  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. 
 
  {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.