fratricide

noun

1. 杀害兄弟（或姐妹）罪；杀害兄弟（或姐妹）者
   the crime of killing your brother or sister; a person who is guilty of this crime
2. 杀害同胞罪；杀害同胞者
   the crime of killing people of your own country or group; a person who is guilty of this crime

1. 杀害兄弟的行为;手足相残的行为
   If someone commits fratricide, they kill their brother.

1. An American soldier killed five other troops inside a psychological counseling center in Baghdad on Monday, the bloodiest case of military fratricide since the start of the Iraq war six years ago.
   周一在巴格达，一名驻伊美军士兵在一家心理咨询中心内枪杀了五名美军士兵，这是伊拉克战争爆发六年以来最为惨烈的战友残杀事件。
2. The crisis might have led to another civil war, but the population was not yet ready for another round of fratricide.
   这场危机差点导致了又一场内战，但是人们还没有准备好又一轮的自相残杀。

noun

1. the murder of your sibling

2. fire that injures or kills an ally

   Synonym:    friendly fire

3. a person who murders their brother or sister