infanticide Syllabification: (in·fan·ti·cide)Pronunciation: /inˈfantiˌsīd/Translate infanticide | into Italian Definition of infanticide noun 1the crime of killing a child within a year of birth. the practice in some societies of killing unwanted children soon after birth. 2a person who kills an infant, especially their own child. Derivatives infanticidalPronunciation: /-ˌfantiˈsīdl/ adjective Origin: mid 17th century: via French from late Latin infanticidium, from Latin infant- (see infant) + -cidium (see -cide)infanticide in other Oxford dictionaries Definition of infanticide in the British & World English dictionary