• synonyms


[ uh-tree-zhuh, -zhee-uh ]
/ əˈtri ʒə, -ʒi ə /

noun Medicine/Medical.

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

Nearby words

atrahasis, atraumatic suture, atrazine, atrek, atremble, atresia, atresic, atretic, atreus, atria, atrial

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

British Dictionary definitions for atretic


/ (əˈtriːʒɪə, -ʒə) /


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 atretic



"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 atretic (1 of 2)


[ ə-trĕtĭk ]


Relating to atresia.

Medicine definitions for atretic (2 of 2)


[ 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.