noun
a diagram that shows the relationship between members of a family over a long period of time :
How far back can you trace your family tree?
noun
a diagram that shows the relationship between members of a family over a long period of time :
How far back can you trace your family tree?
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005