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Origin of pyrexia

1760–70; < New Latin < Greek pýrex(is) feverishness + -ia -ia
Related formspy·rex·i·al, py·rex·ic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Historical Examples of pyrexia

British Dictionary definitions for pyrexia


  1. a technical name for fever
Derived Formspyrexial or pyrexic, adjective

Word Origin for pyrexia

C18: from New Latin, from Greek purexis, from puressein to be feverish, from pur fire
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for pyrexia

"fever," 1769, medical Latin, from Greek pyrexis "feverishness," from pyressein "to be feverish, to be ill of fever," from pyretos "fever, burning heat," related to pyr "fire" (see fire (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

pyrexia in Medicine


  1. fever
Related formspy•rexi•al null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.