sororicide

N การ ฆ่า พี่ หรือ น้อง ตัวเอง 

SORORICIDE

n.[L. soror, sister, and cado, to strike, to kill. ] The murder or murderer of a sister. [Little used, and obviously because the crime is very infrequent. ]

SORORICIDE

So *ror "i *cide, n. Etym: [L. sororocida, and sororicidium; soror a sister + caedere to kill. ]