/ ˌdʒiːniˈælədʒi; NAmE / noun ( pl. -ies )
1.
[ U ] the study of family history, including the study of who the ancestors of a particular person were
2.
[ C ] a particular person's line of ancestors ; a diagram that shows this
► ge·nea·logic·al / ˌdʒiːniəˈlɒdʒɪkl; NAmE -ˈlɑːdʒ-/ adjective [ only before noun ]:
a genealogical chart / table / tree (= a chart with branches that shows a person's ancestors )
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WORD ORIGIN
Middle English : via Old French and late Latin from Greek genealogia , from genea race, generation + -logia (see -logy ).