Which term describes a family that includes additional relatives like grandparents and cousins?

The term that describes a family including additional relatives such as grandparents and cousins is "extended family." Extended families go beyond the immediate members of a household, which typically consist of parents and their children. In this context, the inclusion of relatives from previous generations, as well as other family members, creates a larger family network, offering increased support, interaction, and responsibilities that are spread among the members.

This concept contrasts with other family structures; for example, a nuclear family is comprised solely of parents and their children, focusing on the immediate familial unit. A blended family refers to a family formed from the merging of two separate families, where new step-relationships are established, but it does not necessarily include a broader network of relatives. Similarly, a single parent family consists of only one parent living with their children, without any additional extended family members directly included in that immediate household. Thus, "extended family" is distinctly characterized by its broader scope and inclusion of various relatives beyond the nuclear structure.