stepchild

English Thesaurus

1. a child of your spouse by a former marriage (noun.person)

hypernym	:	child, kid,
definition	:	a human offspring (son or daughter) of any age (noun.person)

hyponym	:	stepdaughter,
definition	:	a daughter of your spouse by a former marriage (noun.person)

hyponym	:	stepson,
definition	:	the son your spouse by a former marriage (noun.person)