Misadventure
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A mischance or accident; a casualty caused by the act of one person and inflicting injury upon another. Homicide "by misadventure" is where a man, doing a lawful act, without any intention of hurt, unfortunately kills another.
4 Bl. Comm. 182; Williamson v. State, 2 Ohio Cir. Ct. R. 292; Johnson v. State, 94 Ala. 35, 10 South. 667.