parricide

noun

1. Someone who kills a relative, especially a parent.

   “I told him the reuenging Gods, / ’Gainst Paricides did all the thunder bend […]”

2. Someone who commits treason.
3. (countable, uncountable)The killing of a relative, especially a parent.

   “The new accusation brought by Urban against Manfred of murdering his sister-in-law's embassador – it may be observed that, tacitly, he acquits him of parricide, fratricide, and nepoticide – requires a little explanation.”

   “The production of Schiller’s ‘Don Carlos’ was long forbidden, because Don Carlos loved his stepmother; in ‘The Robbers,’ the Father was turned into an uncle, and a stupendous effect was produced by the cry of “Unclecide,” substituted for Parricide.”

4. (countable, uncountable)The killing of a ruler, or other authority figure; treason.