Parricide：the crime of killing your father, mother or a close relative; a person who is guilty of this crime 杀父（或母、近亲）罪；杀父（或母、近亲）者。强调指杀害自己的近亲属，特指杀害自己的亲父或亲母。

Patricide：the crime of killing your father; a person who is guilty of this crime 弑父罪；弑父者。即Fratricide。Matricide则是指杀害母亲的犯罪行为 (act of killing one's own mother)。

Parenticide：he act of murdering one's parent) 指谋杀自己的生父或生母的行为。

参考双语例句：

The Chinese monarch neither neglected the message as Heraclius did, nor insulted the envoys after the fashion of the parricide Kavadh.

中国皇帝既没有象赫拉克利乌斯那样对那封信置之不理，也没有照弑亲者卡瓦德那样侮辱送信的人。

In fact, we all know that in ancient Chinese dynasties, the emperors always requested their people to be pious to the utmost to their parents but they were actually utterly depraved themselves, usurping the throne, embroiled in fratricides and feuds between fathers and sons and these were all very commonplace occurrences.

实上，大家都知道，在中国古代皇朝中，为皇者经常要求人民事亲至孝，自己其实却充满污秽，篡权夺位，兄弟相残，父子反目，比比皆是。

​来源：译问