Definition of familial adjective from the Oxford Advanced American Dictionary

     

    familial

     adjective
    adjective
    NAmE//fəˈmɪlyəl//
     
    [only before noun](formal)
     
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  1. 1related to or typical of a family
  2. 2(medical) (of diseases, conditions, etc.) affecting several members of a family familial left-handedness
See the Oxford Advanced Learner's Dictionary entry: familial