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a. The killing of one's brother or sister.
b. One who has killed one's brother or sister.
2. The accidental killing of an ally caused by a discharge of a military weapon.

[Middle English, from Old French, from Latin frātricīdium and frātricīda : frāter, frātr-, brother; see bhrāter- in Indo-European roots + -cīdium and -cīda, -cide.]

frat′ri·cid′al (-sīd′l) adj.


[ˌfrætrɪˈsaɪdəl] adj [war, conflict] → fratricide
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Known for fratricidal wars, which had claimed the lives of Arike's parents, the towns were one more time thrown into war after the kinsmen of Aremu decided to burn his wife and child claiming she was an enemy and also triggering a reprisal attack from the Iluduns led by Lowo (Yemi Blaq), Arike's brother.
The third phase 1657 to 1681 began with the fratricidal war between the sons of Shah Jahan who could not wait for their ailing father to die.
The organizers of the forum considered it necessary to analyze new research on the history of the Cossacks during the period of the beginning of the fratricidal war.
According to an unconfirmed story, North Korea once complained about the statue, a sad reminder of the tragic fratricidal war, for describing the North as the smaller and weaker sibling.
Sponsored by the UN Children's Fund (UNICEF), the exhibition is being held in one of the Lebanese capital's landmarks, Beit Beirut, an ornate Ottoman-style building that was reduced to ruins by Lebanon's own period of fratricidal violence from the '70s to the '90s and later restored.
There is a good opportunity to meet the Syrians' aspirations to end the fratricidal war, fully eradicate terrorism and return to normal life," he was quoted by Itar Tass as saying.
It conveyed the desperation, self-deception, fratricidal impulses, paranoia and dread of a people sentenced to die.
The peace initiative should aim to come up with a comprehensive settlement to address fundamental problems and end the on-going fratricidal war in the countryside," he added.
The United States has a rich history of fratricidal wars, but never with an imported one until the tragic 9/11 bombings in the city that never sleeps.
The rapid and comprehensive demise of the Islamic State is the latest reminder that fratricidal jihadis are destined to lose.
The de-escalation zones "have de-facto created the necessary conditions for the end of the fratricidal war in Syria and the final defeat of terrorists as well as for the Syrian people's return to normal life," Putin said at the news conference in the capital of Turkey, Ankara, RT reported.
Tillerson is right to see this as a fratricidal dispute that should be resolved through negotiation.