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Definition of atresia
1 : absence or closure of a natural passage of the body
2 : absence or disappearance of an anatomical part (such as an ovarian follicle) by degeneration
From the M-W Editors
Recent Examples of atresia from the Web
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Goldring’s condition was pulmonary atresia with tetralogy of Fallot.
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Robertson was born with a chronic liver disease called biliary atresia that affects his physical growth.
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TOF affects one in 2,500 newborns; the pulmonary atresia variety affects less than 20% of that number.
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In tetralogy of Fallot with pulmonary atresia, there's also a hole between the right and left pumping chambers of the heart.
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What is tetralogy of Fallot with pulmonary atresia?
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'atresia'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of atresia
New Latin, from 2a- + Greek trēsis perforation, from tetrainein to pierce — more at 1throw
Medical Dictionary
atresia
playMedical Definition of atresia
1: absence or closure of a natural passage of the body atresia of the small intestine
2: absence or disappearance of an anatomical part (as an ovarian follicle) by degeneration
Learn More about atresia
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See words that rhyme with atresia Britannica.com: Encyclopedia article about atresia
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