Emily Dickinson Lexicon
Definition for PY-RO'SIS
PY-RO'SIS, n. [Gr. πυρωσις, a burning.]
In medicine, a disease of the stomach, attended with a sensation of burning in the epigastrium, accompanied with an eructation of watery fluid, usually insipid, but sometimes acrid. It is commonly called water-brash.
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