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[fra-tri-sahyd, frey-] /ˈfræ trɪˌsaɪd, ˈfreɪ-/
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 forms
fratricidal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for fratricide
Contemporary Examples
Historical Examples
  • For she, like her father and all the Borgias, firmly believed that Cæsar was a fratricide.

    Lucretia Borgia Ferdinand Gregorovius
  • Absolution to any parricide, matricide, or fratricide, for three ducats.

    Faustus Friedrich Maximilian von Klinger
  • The fratricide also is said by some to have been committed in this place.

  • But what can be expected from the descendants of the fratricide Romulus?

    The Holy Roman Empire James Bryce
  • And the history of human wo begins with Cain the fratricide.

    Wanderings in Corsica, Vol. 1 of 2 Ferdinand Gregorovius
  • Had he been so, the cradle of the world might not have been defiled with the blood of fratricide.

    Bible Romances George W. Foote
  • Or do you think that you are not to be compared to that fratricide?

  • Yet Robert was believed to have seized the throne by fratricide.

    Naples Past and Present Arthur H. Norway
  • Killdare, did you know that fratricide is shockingly common?

    Kastle Krags Absalom Martin
British Dictionary definitions for fratricide


/ˈfrætrɪˌsaɪd; ˈfreɪ-/
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 Forms
fratricidal, adjective
Word Origin
C15: from Latin frātricīda; see frater1, -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
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Word Origin and History for fratricide

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
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