Frat″ri‐cide (?), n. [L. fratricidium a brother's murder, fr. fratricida a brother's murderer; frater, fratris, brother + caedere to kill: cf. F. fratricide.] 1. The act of one who murders or kills his own brother.
2. [L. fratricida: cf. F. fratricide.] One who murders or kills his own brother.