achalasia
acha·la·sia
noun \ˌā-kə-ˈlā-zh(ē-)ə\Definition of ACHALASIA
: failure of a ring of muscle (as the anal sphincter or one of the esophagus) to relax
Origin of ACHALASIA
New Latin, from a- + Greek chalasis slackening + New Latin -ia
First Known Use: 1914
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