noun Pathology.
local or generalized invasion of the body by pathogenic microorganisms or their toxins: dental sepsis; wound sepsis.

1855–60; < Greek sêpsis decay; compare sḗpein to make rotten Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
sepsis (ˈsɛpsɪs)
the presence of pus-forming bacteria in the body
[C19: via New Latin from Greek sēpsis a rotting; related to Greek sēpein to cause to decay]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1876, from Mod.L. sepsis, from Gk. sepsis "putrefaction," from sepein "to rot," of unknown origin.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

sepsis sep·sis (sěp'sĭs)
n. pl. sep·ses (-sēz)

  1. The presence of pathogenic organisms or their toxins in the blood or tissues.

  2. The poisoned condition resulting from the presence of pathogens or their toxins.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
sepsis   (sěp'sĭs)  Pronunciation Key 
A severe infection caused by pathogenic organisms, especially bacteria, in the blood or tissues. If untreated, a localized infection, as in the respiratory or urinary tracts, can lead to infection in the bloodstream and widespread inflammation, characterized initially by fever, chills, and other symptoms and later by septic shock.

septic adjective
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Sepsis is caused by a bacterial infection that can begin anywhere in the body.
The cause was acute sepsis after an operation, his family said.
Instead, you need to rush to the nearest emergency room before you die from
Sepsis symptoms, however, can be even more confusing.
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