achalasia
/ˌækəˈleɪzɪə/noun
mass noun
- Medicine a condition in which the muscles of the lower part of the oesophagus fail to relax, preventing food from passing into the stomach【医】弛缓不能。
词源
early 20th cent.: from A-1 'without, not' + Greek khalasis 'loosening' （from khalan 'relax'） + IA1.