fratricide has definitions from the fields of law,criminal law,military
1
[ noun ] (law,criminal law) a person who murders their brother or sister

Related terms

murderer

2
[ noun ] (military) fire that injures or kills an ally

Synonyms

friendly_fire

Related terms

fire

3
[ noun ] (law,criminal law) the act of murdering your own brother or sister

Related terms

murder

*