'Sororicide' definitions:

Definition of 'Sororicide'

From: GCIDE

Sororicide \So*ror"i*cide\ (?; 277), n. [L. sororocida, and sororicidium; soror a sister + caedere to kill.] The murder of one's sister; also, one who murders or kills one's own sister. --Johnson. [1913 Webster]