Noun
Properly, one who murders one's own father; in a wider sense, one who murders one's father or mother or any ancestor.
The act or crime of murdering one's own father or any ancestor.
Source: Webster's dictionaryAbove the punitive city hangs this iron spider; and the criminal who is to be thus crucified by the new law is parricide. Michel Foucault
As someone very sagely said during the parricide trials of the Menendez Brothers: anytime your kids kill you, you are at least partly to blame. Elizabeth Wurtzel