A family tree is a visual representation of the relationships between individuals in a family, typically including their ancestors and descendants. It is also known as a HEREDITY (8 letters), LINE (4 letters), BLOODLINE (9 letters), HERITAGE (8 letters), HOUSE (5 letters), EXTRACTION (10 letters), STOCK (5 letters), GENEALOGY (9 letters), STRAIN (6 letters), STIRPS (6 letters), DESCENT (7 letters), STEMMA (6 letters), LINEAGE (7 letters), ANCESTRY (8 letters), GENETICS (8 letters), PEDIGREE (8 letters), and totempole (9 letters). It is used to trace the history of a family and to understand the relationships between its members.