1.1 [count noun] A person who kills their sister.
- Anna is barely sane; and Helen is a sororicide.
- Roman historians tend to present the sororicide in a positive light, stressing Horatia's father's public vindication of his son.
- My error was demonstrated to me in black and white: the sororicide had to be acquitted.
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Line breaks: sor¦ori|cide
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