<embryology> Having an abnormal closure or absence of a body opening or tubular organ (for example, a child born without an oesophagus would have an atretic birthdefect). ... (09 Oct 1997) ... 
Type: Term Pronunciation: ă-tret′ik Definitions: 1. Relating to atresia. Synonyms: atresic, imperforate
(ua-tret;ik) Without an opening. Atretic ovarian follicles are those that fail to ovulate.