[uh-tree-zhuh, -zhee-uh]

noun Medicine/Medical.

the congenital absence, or the pathological closure, of an opening, passage, or cavity.

Origin of atresia

1800–10; < New Latin < Greek a- a-6 + três(is) perforation + -ia -ia
Related formsa·tre·sic [uh-tree-zik, -sik] /əˈtri zɪk, -sɪk/, a·tret·ic [uh-tret-ik] /əˈtrɛt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for atresia

Historical Examples of atresia

British Dictionary definitions for atresia



absence of or unnatural narrowing of a body channel

Word Origin for atresia

C19: New Latin, from Greek atrētos not perforated
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for atresia

"occlusion of a natural passage in the body," 1807, from Modern Latin atresia, from Greek atretos "not perforated," from a-, privative prefix, + tresis "perforation," from PIE *tere- "to rub, turn," with derivatives referring to boring and drilling (see throw (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for atresia


[ə-trēzhə, -zhē-ə]


The congenital absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.
The degeneration and resorption of one or more ovarian follicles before maturation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.