Atresia

n.

1.

(Med.) Absence or closure of a natural passage or channel of the body; imperforation.

Noun

1.

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

Pronunciation: (uh-TREEZ-ya)

Lack of a normal opening from the esophagus, intestines, or anus.

abnormal condition, abnormalcy, abnormality