achalasia

noun
acha·​la·​sia | \ ˌā-kə-ˈlā-zh(ē-)ə How to pronounce achalasia (audio) \

Definition of achalasia

: failure of a ring of muscle (such as the anal sphincter or one of the esophagus) to relax

First Known Use of achalasia

1914, in the meaning defined above

History and Etymology for achalasia

a- entry 2 + Greek chálasis "loosening, relaxation" (from chaláō, chalân "to loosen" —of obscure origin— + -sis -sis) + -ia entry 1

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The first known use of achalasia was in 1914

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More Definitions for achalasia

achalasia

noun
acha·​la·​sia | \ ˌā-kə-ˈlā-zh(ē-)ə How to pronounce achalasia (audio) \

Medical Definition of achalasia

: failure of a ring of muscle (as a sphincter) to relax achalasia of the esophagus achalasia of the anal sphincter — compare cardiospasm

More from Merriam-Webster on achalasia

Britannica.com: Encyclopedia article about achalasia

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