pyrogen

[ pahy-ruh-juh n, -jen ]
/ ˈpaɪ rə dʒən, -ˌdʒɛn /
|

noun

a substance, as a thermostable bacterial toxin, that produces a rise in temperature in a human or animal.

Origin of pyrogen

First recorded in 1855–60; pyro- + -gen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for pyrogen

British Dictionary definitions for pyrogen

pyrogen

/ (ˈpaɪrəʊˌdʒɛn) /

noun

any of a group of substances that cause a rise in temperature in an animal body
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

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."

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for pyrogen

pyrogen

[ pīrə-jən ]

n.

A substance that produces a fever.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for pyrogen

pyrogen

[ pīrə-jən ]

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).
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.