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[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.
Origin of atresia
1800-10; < New Latin < Greek a- a-6 + três(is) perforation + -ia -ia
Related forms
[uh-tree-zik, -sik] /əˈtri zɪk, -sɪk/ (Show IPA),
[uh-tret-ik] /əˈtrɛt ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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British Dictionary definitions for atresia


/əˈtriːʒɪə; -ʒə/
absence of or unnatural narrowing of a body channel
Word Origin
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
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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
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atresia in Medicine

atresia a·tre·sia (ə-trē'zhə, -zhē-ə)

  1. The congenital absence or closure of a normal body orifice or tubular passage such as the anus, intestine, or external ear canal.

  2. 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.
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