achalasia

Meaning

1. A neuromuscular condition where a ring of muscles is unable to relax fully, causing obstruction of a lumen, as:
2. Such obstruction due to impairment of other gastrointestinal tract smooth muscles.
3. Such obstruction in the esophagus: esophageal achalasia.
4. Such esophageal achalasia of primary (idiopathic) nature: primary esophageal achalasia.

Etymology / origin

From Ancient Greek ἀ- (a-, “not”) + χάλασις (khálasis, “relaxation”), from χαλάω (khaláō, “I loosen”).

Sources

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