n.
Pronunciation: ə - ' tr ē -zh ə
Function: noun
Etymology: New Latin, from 2 a- + Greek tr ē sis 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