- Exitial Ex*i"tial, Exitious Ex*i"tious, a. [L. exitialis, exitious, fr. exitium a going out, a going to naught, i. e., ruin, fr.exire to go out: cf. F. exitial.] Destructive; fatal. [Obs.] ``Exitial fevers.'' --Harvey. [1913 Webster]
The Collaborative International Dictionary of English. 2000.