ˈrejəˌsīd noun
( -s )
Etymology: probably from (assumed) New Latin regicida, from Latin regi- (from reg-, rex king) + -cida -cide — more at royal
1. : one who kills, murders, or shares overt responsibility (as by acting as judge or executioner) for the death of a king especially to whom he is naturally subject
2.
[probably from (assumed) New Latin regicidium, from Latin regi- (from reg-, rex king) + -cidium -cide]
: the killing or murder of a king