sep·tic 
(sĕptĭk)
(sĕptĭk)adj.
1. Of, relating to, having the nature of, or affected by sepsis.
2. Causing sepsis; putrefactive.
[Latin sēpticus, putrefying, from Greek sēptikos, from sēptos, rotten, from sēpein, to make rotten.]
sep·tici·ty (-tĭsĭ-tē) n.