Main Entry: atre·sia

Pronunciation: \ə-ˈtrē-zhə\

Function: noun

Etymology: New Latin, from ²a- + Greek trēsis perforation, from tetrainein to pierce — more at throw

Date: circa 1807

1 : absence or closure of a natural passage of the body
2 : absence or disappearance of an anatomical part (as an ovarian follicle) by degeneration