noun Pathology.
heartburn ( def 1 ).

1780–90; < Neo-Latin < Greek pȳrōsis; see pyr-, -osis Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pyrosis (paɪˈrəʊsɪs)
pathol a technical name for heartburn
[C18: from New Latin, from Greek: a burning, from puroun to burn, from pur fire]

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Main Entry:  pyrosis
Part of Speech:  n
Definition:  See acid reflux's 21st Century Lexicon
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American Heritage
Medical Dictionary

pyrosis py·ro·sis (pī-rō'sĭs)
See heartburn.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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