An infant or baby is the term used to refer to the very young offspring of humans.
The term "infant" derives from the Latin word infans, meaning "unable to speak." "Infant" is also a legal term referring to any child under the age of legal adulthood.
A human infant less than a month old is a "neonate." The term "newborn" includes premature infants, postmature infants and full term newborns.