Source : Webster's Revised Unabridged Dictionary (1913)

Patricide \Pat*ri"cide\, n. [L. pater father + caedere to kill.
   Cf. {Parricide}.]
   1. The murderer of his father.

   2. The crime of one who murders his father. Same as
      {Parricide}.

Source : WordNet®

patricide
     n 1: a person who murders their father
     2: murder of your father