filicide

noun2

1. •
   The killing of one's own child.

   • it began by violating nature, and ends in filicide. (I, v) — 1820
2. •
   A person who kills his or her own child.

   • Ned is running, panicked, […] running for the cold hard road and the sanctuary of the Brunch farm like a filicide caught in the act. — 1982