Per infortunium
Defined in 2 dictionaries — Ballentine's (1916), Black's (1910)
Ballentine's Law Dictionary
James A. Ballentine · 1916
Accidentally.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
Lat. By misadventure. In criminal law, homicide per infortunium is committed where a man, doing a lawful act, without any intention of hurt, unfortunately kllls another. 4 Bl. Comm. 182.