Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. See heartburn.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A burning sensation in the chest due to reflux of stomach contents in the esophagus.

from the GNU version of the Collaborative International Dictionary of English

  • n. See Water brash, under brash.

from The Century Dictionary and Cyclopedia

  • n. In pathology, the eructation of watery fluid, usually insipid, but sometimes acrid, attended with more or less burning pain in the epigastrium. It is commonly called water-brash.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. 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

Etymologies

New Latin pyrōsis, from Greek purōsis, a burning, from puroun, to burn, from pūr, fire.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek πύρωσις (purosis, "burning"). (Wiktionary)

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