achalasia

noun
acha·la·sia | \ˌā-kə-ˈlā-zh(ē-)ə \

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

Keep scrolling for more

Learn More about achalasia

Statistics for achalasia

Look-up Popularity

Time Traveler for achalasia

The first known use of achalasia was in 1914

See more words from the same year

Keep scrolling for more

More Definitions for achalasia

achalasia

noun
acha·la·sia | \ˌā-kə-ˈlā-zh(ē-)ə \

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

Comments on achalasia

What made you want to look up achalasia? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

lying above or upon

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!