Noun
Stepfather or stepmother.
Source: Webster's dictionaryIn Islamic law, marriage among close blood relations like parents, stepparent, parents in-law, siblings, stepsiblings, the children of siblings, aunts and uncles is prohibited, while first or second cousins may marry. Source: Internet
They take into account of a detailed counting of family structure, not only with two biological parents or stepparent families, but also with types of single-parent families with each other (mother-only, father-only, never-married, and other). Source: Internet
National Council For Adoption, Adoption Factbook, 2000, Table 11 A common example of this is a "stepparent adoption", where the new partner of a parent may legally adopt a child from the parent's previous relationship. Source: Internet