Fratricide

Fratricide (from the Latin word frater, meaning: "brother" and cide meaning to kill) is the act of a person killing his or her brother or sister.

Related concepts are sororicide (the killing of one's sister), child murder (the killing of an unrelated child), infanticide (the killing of a child under the age of one year), filicide (the killing of one's child), patricide (the killing of one's father), matricide (the killing of one's mother), and uxoricide (the killing of one's wife)).

The term may also be used to refer to friendly fire incidents. In a United States military context, it may also refer to an incident where the catastrophic failure and disintegration of one jet engine in a twin-engined fighter aircraft causes the damage or destruction of the second engine, and possibly leads to the loss of the entire aircraft.