in·fan·ti·cide 
(ĭn-făntĭ-sīd′)
(ĭn-făntĭ-sīd′)n.
1. The act of killing an infant.
2. The practice of killing newborn infants.
3. One who kills an infant.
[Late Latin īnfanticīdium, the killing of a child and īnfanticīda, killer of a child : Latin īnfāns, īnfant-, infant; see INFANT + Latin -cīdium and -cīda, -cide.]
in·fan′ti·cidal (-sīdl) adj.