Fratricide

n.	1.	The act of one who murders or kills his own brother.
	2.	One who murders or kills his own brother.

Noun	1.	fratricide - a person who murders their brother or sister
	2.	fratricide - the act of murdering your own brother or sister
	3.	fratricide - fire that injures or kills an ally Synonyms: friendly fire

aborticide, fungicide, genocide, germicide, herbicide, homicide, infanticide, insecticide, matricide, microbicide, parricide, patricide, pesticide, regicide, rodenticide, sororicide, suicide, uxoricide, vermicide