Sui generis
A similar case that led to the use of the label "sui generis" is the relationship of New Caledonia relative to France, because the legal status of New Caledonia can aptly be said to lie somewhere between a French overseas collectivity and a sovereign nation. Although other examples of such status for other dependent or disputed territories may exist, this arrangement is unique within the French realm.
Filicide
Filicide is the deliberate act of a parent killing his or her own child. The word "filicide" is derived from the Latin words "filius" and "filia" (son and daughter) and the suffix "-cide", meaning to kill, murder, or cause death. The word can refer both to the crime and to the perpetrator of the crime.