D defs.my
Entry 2 senses Webster, 1913

Fratricide

/frăt'-rəs-īdˌ/ · Frat·ri·cide · IPA /frˈætrəsˌaɪd/
01 n. The act of one who murders or kills his own brother.
  1. 1.
    The act of one who murders or kills his own brother.
  2. 2.
    One who murders or kills his own brother.