Source : Webster's Revised Unabridged Dictionary (1913)

Infanticide \In*fan"ti*cide\, n. [L. infanticidium child murder;
   infans, -antis, child + caedere to kill: cf. F. infanticide.
   See {Infant}, and {Homicide}.]
   The murder of an infant born alive; the murder or killing of
   a newly born or young child; child murder.

Infanticide \In*fan"ti*cide\, n. [L. infanticida: cf. F.
   infanticide.]
   One who commits the crime of infanticide; one who kills an
   infant.

Source : WordNet®

infanticide
     n 1: a person who murders an infant
     2: murdering an infant