Main Entry: frat·ri·cide

Pronunciation: \ˈfra-trə-ˌsīd\

Function: noun

Etymology: in sense 1, from Middle English, from Middle French or Latin; Middle French, from Latin fratricida, from fratr-, frater brother + -cida -cide; in sense 2, from Middle French or Latin; Middle French, from Latin fratricidium, from fratr-, frater + -cidium -cide

Date: 15th century

1 : one that murders or kills his or her own brother or sister or an individual (as a countryman) having a relationship like that of a brother or sister
2 : the act of a fratricide

— frat·ri·cid·al \ˌfra-trə-ˈsī-d^əl\ adjective