Reg"i*cide (r?j"?*s?d), n. [F. r'egicide; L. rex, regis, a king + caedere to kill. Cf. Homicide.]
1.
One who kills or who murders a king; specifically Eng.Hist., one of the judges who condemned Charles I. to death.
2.
The killing or the murder of a king.
© Webster 1913.