Atresia

[ә'tri:siә]

解释:

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

手打:尤赖亚--From WordNet

解释:

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

编辑:帕梅拉