The Collaborative International Dictionary
Mortiferous
Mortiferous \Mor"tif"er*ous\,
[L. mortifier; mors, mortis, death + ferre to bring: cf. F. mortif[`e]re.] Bringing or producing death; deadly; destructive; as, a mortiferous her
--Gov. of Tongue.
Wiktionary
mortiferous
a. 1 (context now rare English) Causing spiritual death. (from 16th c.) 2 Causing physical death; deadly, fatal, lethal. (from 16th c.)
Usage examples of "mortiferous".
His gaze drifted up to alight on the mortiferous face of Earl Dante before returning back to my own.
And looking vpon my selfe, I was ashamed to see my vile habite among suche sumpteous induments, that me thought my selfe no otherwaies but euen lyke that vile and mortiferous beast among the most noble signes of the Zodiac.