|a.||1.||(Math.) Of the seventh degree or order.|
|1.||Having power to promote putrefaction.|
|n.||1.||A substance that promotes putrefaction.|
|Adj.||1.||septic - containing or resulting from disease-causing organisms; "a septic sore throat"; "a septic environment"; "septic sewage"|
antiseptic - thoroughly clean and free of or destructive to disease-causing organisms; "doctors in antiseptic green coats"; "the antiseptic effect of alcohol"; "it is said that marjoram has antiseptic qualities"
|2.||septic - of or relating to or caused by putrefaction; "the septic action occurs at the bottom of the septic tank"|