Exitial
Pronunciation : Ex*i"tial, Ex*i"tious
Part of Speech : a.
Etymology : [L. exitialis, exitious, fr. exitium a going out, a going to naught, i. e., ruin, fr.exire to go out: cf. F. exitial.]
Definition : Defn: Destructive; fatal. [Obs.] "Exitial fevers." Harvey.
Source : Webster's Unabridged Dictionary, 1913