adjective Pathology.
pertaining to or of the nature of sepsis; infected.

1595–1605; < Latin sēpticus < Greek sēptikós, equivalent to sēpt(ós) rotted + -ikos -ic

septically, adverb
septicity [sep-tis-i-tee] , noun
nonseptic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
septic (ˈsɛptɪk)
1.  of, relating to, or caused by sepsis
2.  of, relating to, or caused by putrefaction
3.  informal (Austral), (NZ) short for septic tank
[C17: from Latin sēpticus, from Greek sēptikos, from sēptos decayed, from sēpein to make rotten]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

c.1600, from L. septicus "of or pertaining to putrefaction," from Gk. septikos "characterized by putrefaction," from sepein "cause to rot" (see sepsis). Septic tank is attested from 1902.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

septic sep·tic (sěp'tĭk)

  1. Of, relating to, having the nature of, or affected by sepsis.

  2. Causing or producing sepsis; putrefactive.

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
Septic shock is a serious condition that occurs when an overwhelming infection
  leads to life-threatening low blood pressure.
Still, a little septic slip shouldn't tank his or her grade.
Septic systems and sewers, in what are now suburban neighborhoods.
They investigate possible food sources in garbage piles, septic tanks, and
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