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hyperpyrexia

[hahy-per-pahy-rek-see-uh]
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noun Pathology.
  1. an abnormally high fever.
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Origin of hyperpyrexia

First recorded in 1865–70; hyper- + pyrexia
Related formshy·per·py·ret·ic [hahy-per-pahy-ret-ik] /ˌhaɪ pər paɪˈrɛt ɪk/, hy·per·py·rex·i·al, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hyperpyrexia

hyperpyrexia

noun
  1. pathol an extremely high fever, with a temperature of 41°C (106°F) or aboveAlso called: hyperthermia, hyperthermy
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Derived Formshyperpyretic (ˌhaɪpəpaɪˈrɛtɪk) or hyperpyrexial, adjective
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

hyperpyrexia in Medicine

hyperpyrexia

(hī′pər-pī-rĕksē-ə)
n.
  1. Abnormally high fever.
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Related formshy′per•py•rexi•al null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.