Fratricide

Note: Varies by jurisdictionNote: Varies by jurisdictionFratricide (from the Latin words frater 'brother' and cida 'killer,' or cidum 'a killing,' both from caedere 'to kill, to cut down') is the act of killing one's brother. Fratricide (from the Latin words frater 'brother' and cida 'killer,' or cidum 'a killing,' both from caedere 'to kill, to cut down') is the act of killing one's brother.