第三人称单数：genealogies
1. 家谱学；系谱学；宗谱学
Genealogy is the study of the history of families, especially through studying historical documents to discover the relationships between particular people and their families.
1. 七彩网.英语单词
noun
1. the study or investigation of ancestry and family history
2. successive generations of kin
Synonym: family tree