Hi, Here is a Kinship Glossary: http://www.as.ua.edu/ant/Faculty/murphy/436/kinship.htm Extended Family: "A domestic group or composite of domestic groups consisting of two or more nuclear families linked together through parent and child (patrilineal extended family, matrilineal extended family) or through siblings (fraternal or sorroral extended family)." (RK:149). The social unit, usually co-residing, consisting of two or more nuclear families affiliated through an extension of parent-child relationships; i.e., the nuclear family of a married adult joined to that of his/her parents (NG-359). Regards, Glenda