gastroesophageal reflux

Gastroesophageal Reflux Disease (GERD; or GORD when spelling œsophageal, the BrE form) is defined as chronic symptoms or mucosal damage produced by the abnormal reflux in the esophagus. This is commonly due to transient or permanent changes in the barrier between the esophagus and the stomach. This can be due to incompetence of the lower esophageal sphincter (LES), transient LES relaxation, impaired expulsion of gastric reflux from the esophagus, or a hiatal hernia.
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Gastroesophageal reflux n. A backflow of the contents of the stomach into the esophagus, caused by relaxation of the lower esophageal sphincter. [more]Gastroesophageal reflux - Community and Resources

Noun
1. reflux of stomach contents into the esophagus
(synonym) esophageal reflux, oesophageal reflux
(hypernym) reflux

[GAS-tro-eh-sof-a-JEE-al REE-flux]
The backward flow of stomach acid contents into the esophagus (the tube that connects the mouth to the stomach). Also called esophageal reflux or gastric reflux.