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atresia

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

noun

Medicine/Medical.
  1. the congenital absence, or the pathological closure, of an opening, passage, or cavity.


atresia British  
/ -ʒə, əˈtriːʒɪə /

noun

  1. absence of or unnatural narrowing of a body channel

"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

Other Word Forms

Etymology

Origin of atresia

1800–10; < New Latin < Greek a- a- 6 + três ( is ) perforation + -ia -ia

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Ipsen said its Bylvay drug didn’t meet the main objective in a late-stage clinical trial that tested the medicine in biliary atresia, a rare and serious liver disease that affects babies.

From The Wall Street Journal Jul. 24, 2026

She said Reggie was born with a number of health complications, including oesophageal atresia and skeletal dysplasia, meaning he will have to have both legs amputated.

From BBC Sep. 27, 2025

Billy was born with a condition called tetralogy of Fallot with pulmonary atresia, a severe heart defect that occurs in approximately one in 2,500 babies.

From Los Angeles Times May 28, 2024

Cecilia had been suffering since birth with biliary atresia.

From Seattle Times Jun. 18, 2021

Sometimes there is a complete closure or atresia of the lower part of the colon.

From The Mother and Her Child by Sadler, William S.

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