the GNU version of the Collaborative International Dictionary of English
n. Tendency to putrefaction; septic quality.
The Century Dictionary and Cyclopedia
n. Septic character or quality; tendency to promote putrefaction; sepsis.
Word Usage
"Chemical dosing systems for septicity control The dosing of nitrate-based chemicals is the water industry's most widely used methods of controlling levels of septicity in rising mains, and the Michael Smith Systems Division of Gee "