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achalasia

[ak-uh-ley-zhuh, -zhee-uh, -zee-uh] /ˌæk əˈleɪ ʒə, -ʒi ə, -zi ə/
noun, Medicine/Medical
1.
inability of a circular muscle, especially of the esophagus or rectum, to relax, resulting in widening of the structure above the muscular constriction.
Origin
1910-1915
1910-15; a-6 + Greek chálas(is) (chala- (stem of chalân to loosen) + -sis -sis) + -ia
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for achalasia

achalasia

/ˌækəˈleɪzɪə/
noun
1.
(pathol) failure of the cardiac sphincter of the oesophagus to relax, resulting in difficulty in swallowing
Word Origin
New Latin, from a-1 + Greek chalasis relaxation
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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achalasia in Medicine

achalasia ach·a·la·sia (āk'ə-lā'zhə)
n.
The failure of a ring of muscle fibers, such as a sphincter, to relax.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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