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1. Containing or resulting from disease-causing organisms
   "a septic sore throat"; "a septic environment"; "septic sewage"
   - infected
    
2. Of or relating to or caused by putrefaction
   "the septic action occurs at the bottom of the septic tank"

See also: abscessed, contaminative, decomposition, dirty, germy, infectious, infective, pestiferous, purulent, pussy, putrefacient, putrefactive, sepsis, septicemic, unhealthful

Antonym: antiseptic

Encyclopedia: Septic