Definition from Wiktionary, the free dictionary
- Producing pestilence or plague; pestilent.
1941, Chapman Miske, The Thing in the Moonlight:
- Casting my eyes about, I beheld no living object; but was sensible of a very peculiar stirring far below me, amongst the whispering rushes of the pestilential swamp I had lately quitted.
pestilential m (oblique and nominative feminine singular pestilentiale)