atresia noun. [ǝ'tri:ʃǝ, -zjǝ] E19.
[from A-¹⁰ + Greek trēsis perforation + -IA¹.]
Medicine.
1. Absence or occlusion, esp. congenital, of a channel or opening of the body. E19.
2. Degeneration of non-ovulating ovarian follicles during the menstrual cycle. E20.

■ atresic [ǝ'tri:sɪk, -zɪk] adjective = atretic L19.

■ atretic [ǝ'trɛtɪk] adjective pertaining to or displaying atresia E20.

[TahlilGaran] English Dictionary ▲