Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The killing of one's sister.
  • noun One who kills one's own sister.

from The Century Dictionary.

  • noun One who kills his sister.
  • noun The murder of a sister.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The murder of one's sister; also, one who murders or kills one's own sister.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun the killing of one's sister
  • noun a person who kills his/her sister

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Latin soror, sister; see swesor- in Indo-European roots + –cide.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Latin sororicida ("one who kills his sister"), from soror ("sister").

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Examples

  • As she has already unseated Lisa's father Frank as Governor, this match-up would make for great political theater and Republican fratricide, or perhaps sororicide.

    Poll: Palin Hasn't Done Herself Any Favors For 2012 2009

  • The intending sororicide and suicide is restored to his fastenings; his sister taken back to her tent; a trooper detailed to stand sentry beside and frustrate any attempt at a second escapade.

    The Lone Ranche Mayne Reid 1850

  • A Shadow That Remains Cast invents an infamous alleged sororicide, a crime for which the older sister is acquitted, vital evidence having gone missing before the trial.

    Londonist 2010

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