[fra-tri-sahyd, frey-]


a person who kills his or her brother.
the act of killing one's brother.

Origin of fratricide

1490–1500; (def 1) < Middle French < frātricīda, equivalent to frātri- (combining form of frāter) brother + -cīda -cide; (def 2) < Middle French < Late Latin frātricīdium, equivalent to frātricīd(a) + -ium noun suffix
Related formsfrat·ri·cid·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for fratricidal

civil, domestic, internal, fratricidal

Examples from the Web for fratricidal

Contemporary Examples of fratricidal

  • What really has rivals drooling is the idea of the fratricidal battle that will ensue if the deal gets done.

    The Daily Beast logo
    Hollywood's Coming Culture Clash

    Kim Masters

    March 25, 2009

Historical Examples of fratricidal

British Dictionary definitions for fratricidal



the act of killing one's brother
a person who kills his brother
military the destruction of or interference with a nuclear missile before it can strike its target caused by the earlier explosion of a warhead at a nearby target
Derived Formsfratricidal, adjective

Word Origin for fratricide

C15: from Latin frātricīda; see frater 1, -cide
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for fratricidal

1804, from fratricide + -al (1).



mid-15c., "person who kills a brother;" 1560s, "act of killing a brother," from Latin fratricida "brother-slayer," from frater "brother" (see brother) + cida "killer," or cidum "a killing," both from caedere "to kill, to cut down" (see -cide). Among several Old English words for this were broðorbana "one who kills a brother;" broðorcwealm "act of killing a brother."

Online Etymology Dictionary, © 2010 Douglas Harper