ge·ne·al·o·gy /-ʤi/
  系譜,宗譜,家系
  Gen·e·al·o·gy n.; pl. Genealogies
  1. An account or history of the descent of a person or family from an ancestor; enumeration of ancestors and their children in the natural order of succession; a pedigree.
  2. Regular descent of a person or family from a progenitor; pedigree; lineage.
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  genealogy
       n : successive generations of kin [syn: family tree]