Webster's English Dictionary

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genealogy

ge.ne.al.o.gy \-je-\ n [ME genealogie, fr. MF, fr. LL genealogia, fr. Gk, 
   fr. genea]race, family + -logia -logy; akin to Gk genos race 1: an account 
   of the descent of a person, family, or group from an ancestor  or from 
   older forms 2: regular descent of a person, family, or group of organisms 
   from a progen itor or older form : PEDIGREE 3: the study of family 
   pedigrees