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achalasia
achalasia [ ákə láyzi ə ]


noun 
Definition:
 
failure of muscle to relax: a failure of smooth muscle bands such as those in the gullet to relax
[Early 20th century. <a-2 + Greek khalasis 'relaxation' < khalan 'loosen']
Encarta® World English Dictionary [World English Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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