The word 'family' is often used to mean the same as the term Nuclear family. Strictly speaking, a nuclear family is made up of a husband, a wife, and their children. It may also be used to include a stepparent, stepchildren or adopted children. However, the latter family unit is more commonly called a blended family. Close kin however extends the family unit. For example, second cousins are all descendants of one or both great-grandparents. Family units extending to second cousins are considered close kin. So the term includes great-grandparents as well. Third cousins (all those descended from second great-grandparents) are not considered close kin, but just family.