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English definition of “achalasia”

achalasia

noun [U] uk   /ˌæk.əˈleɪ.ʒə/ us    // specialized
a condition in which the sphincter muscle of the oesophagus does not relax enough to allow someone to swallow normally: Patients with advanced achalasia may be better managed with primary oesophageal resection.
(Definition of achalasia from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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