Atresia

2 definitions found

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

  Atresia \A*tre"si*a\, n. [NL., fr. Gr. ? not perforated.] (Med.)
     Absence or closure of a natural passage or channel of the
     body; imperforation.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  atresia
       n : an abnormal condition in which a normal opening or tube in
           the body (as the urethra) is closed or absent