baby - the youngest member of a group (not necessarily young); "the baby of the family"; "the baby of the Supreme Court"

by-blow, illegitimate, illegitimate child, love child, whoreson, bastard - the illegitimate offspring of unmarried parents

child, kid - a human offspring (son or daughter) of any age; "they had three children"; "they were able to send their kids to college"

eldest, firstborn - the offspring who came first in the order of birth

grandchild - a child of your son or daughter

relative, relation - a person related by blood or marriage; "police are searching for relatives of the deceased"; "he has distant relations back in New Jersey"

heir, successor - a person who inherits some title or office

consequence, effect, result, upshot, outcome, event, issue - a phenomenon that follows and is caused by some previous phenomenon; "the magnetic effect was greater when the rod was lengthwise"; "his decision had depressing consequences for business"; "he acted very wise after the event"

animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement

hatchling - any recently hatched animal (especially birds)

orphan - a young animal without a mother

young mammal - any immature mammal

young bird - a bird that is still young

spat - a young oyster or other bivalve

young fish - a fish that is young