PYROSIS
heartburn, pyrosis
(noun) a painful burning sensation in the chest caused by gastroesophageal reflux (backflow from the stomach irritating the esophagus); symptomatic of an ulcer or a diaphragmatic hernia or other disorder
Source: WordNet® 3.1
Etymology
Noun
pyrosis (usually uncountable, plural pyroses)
(medicine) A burning sensation in the chest due to reflux of stomach contents in the esophagus.
Synonyms
• heartburn
Source: Wiktionary
Py*ro"sis, n. Etym: [NL., fr Gr. (Med.)
Definition: See Water brash, under Brash.
Source: Webster’s Unabridged Dictionary 1913 Edition