from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A substance that produces fever.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any substance that produces fever, or a rise in body temperature

from the GNU version of the Collaborative International Dictionary of English

  • n. Electricity.
  • n. A poison separable from decomposed meat infusions, and supposed to be formed from albuminous matter through the agency of bacteria.

from The Century Dictionary and Cyclopedia

  • n. Any substance which, introduced into the blood, causes pyrexia or fever.
  • n. The electric fluid.
  • n. A substance formed by the action of heat; specifically, a carbon compound formed in this way.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any substance that can cause a rise in body temperature
  • n. any substance characterized by its great flammability


Sorry, no etymologies found.


  • Aspirin blocks the pyrogen-induced production of prostaglandins, the central nervous system response to COX and the release of interleukin-1.

    Aspirin: effects, poisoning

  • Alternatively, the active ingredient may be in powder form for constitution with a suitable vehicle, e.g., sterile pyrogen-free water, before use. Notable Patent Applications - 07/22/2010

  • When administered, the therapeutic composition for use in this invention is, of course, in a pyrogen-free, physiologically acceptable form. Notable Patent Applications - 07/22/2010

  • When a therapeutically effective amount of antibody of the methods herein is administered by intravenous, cutaneous or subcutaneous injection, protein of the present invention will be in the form of a pyrogen-free, parenterally acceptable aqueous solution. Notable Patent Applications - 07/22/2010

  • Endotoxin stock solutions were prepared in pyrogen free water at 10 nmole/ml concentration and further diluted with endotoxin free PBS to 1 nmole/ml and 100 pmole/ml with extensive vortex and sonication prior to each dilution The effect of noscapine analogs was investigated in time-course and dose-response experiments in well established human and murine cell lines.

    PLoS ONE Alerts: New Articles

  • Allopurinol is pyrogen forgetful with breast-feeding by the american academy of pediatrics.


  • Fever • may be the result of - inflammation or - infection - endogenous pyrogen • Pyrogens released by white blood cells raise the set point of the thermoregulatory centre causing the whole body temperature to increase by 2-3 °C.

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  • I am still debugging that, but I am suspecting two bad igniters as both see to have fired, but failed to ignite the pyrogen and black powder respectively. sign in (if you're already a member).

    The J Curve

  • Packaging was done into pyrogen-free sterile vials (Allergy Labs, Oklahoma City, Oklahoma) in a sterile hood equipped with a HEPA filter.

    PLoS ONE Alerts: New Articles

  • [Footnote: Like Dr. Burdon Sanderson's 'pyrogen,' the particles of mastic passed, without sensible hindrance, through filtering-paper.

    Fragments of science, V. 1-2


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  • deinonychus' comment is language often used in reference to homeopathic preparations which consist almost entirely of water.

    June 6, 2013

  • I don't know about water, but electricity is forever Amber.

    June 6, 2013

  • Heraclitan water? Πάντα ῥεῖ (panta rhei) "everything flows"

    This universe, which is the same for all, has not been made by any god or man, but it always has been, is, and will be an ever-living fire, kindling itself by regular measures and going out by regular measures.

    June 5, 2013

  • It's all just water, anyway...

    June 5, 2013

  • In homeoepathy pyrogen, or Pyrogenium, has a specitifc meaning: This remedy was introduced by English homeopathists, prepared from decomposed lean beef allowed to stand in the sun for two weeks and then potentized. The provings and most of the clinical experience have been obtained from this preparation. But, subsequently, Dr. Swan potentized some septic pus, which preparation has also been proved and clinically applied. There does not seem to be any marked difference in their effects. - See more at:

    June 5, 2013