ach·a·la·sia ( k  -l  zh)n. The failure of a ring of muscle fibers, such as a sphincter of the esophagus, to relax. [New Latin : a- + Greek khalasis, relaxation (from khal n, to loosen).] |
achalasia [ˌækəˈleɪzɪə]
n
(Medicine) Pathol failure of the cardiac sphincter of the oesophagus to relax, resulting in difficulty in swallowing
[New Latin, from a-1 + Greek chalasis relaxation]
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