| atresic | <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) |
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| atresic teratosis | A teratosis in which any of the normal orifices, such as the nares, mouth, anus, or vagina, is imperforate. (05 Mar 2000) |