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pyrogen

[pahy-ruh-juh n, -jen]
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noun
  1. a substance, as a thermostable bacterial toxin, that produces a rise in temperature in a human or animal.
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Origin of pyrogen

First recorded in 1855–60; pyro- + -gen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for pyrogen

Historical Examples

  • Pyrogenet′ic, Pyrog′enous, producing fire: produced by fire; Pyrogen′ic, producing fever.

    Chambers's Twentieth Century Dictionary (part 3 of 4: N-R)

    Various


British Dictionary definitions for pyrogen

pyrogen

noun
  1. any of a group of substances that cause a rise in temperature in an animal body
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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 pyrogen

n.

1858, as a proposed word for "electricity," from pyro- + -gen. Meaning "fever-producer" is from 1896. Related: Pyrogenic; pyrogenetic. Greek pyrogenes meant "born in fire, wrought by fire."

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Online Etymology Dictionary, © 2010 Douglas Harper

pyrogen in Medicine

pyrogen

(pīrə-jən)
n.
  1. A substance that produces a fever.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

pyrogen in Science

pyrogen

[pīrə-jən]
  1. A polypeptide that produces fever by causing metabolic changes in the hypothalamus. Pyrogens are either exogenous (produced by infectious agents) or endogenous (produced by cells in the body such as macrophages).
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.