kinship : Idioms & Phrases
blood kinship
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noun (anthropology) related by blood
cognation; consanguinity.
WordNet
kinship group
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noun group of people related by blood or marriage
clan; tribe; kindred; kin group; kin.
WordNet
kinship system
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noun (anthropology) the system of social relationships that constitute kinship in a particular culture, including the terminology that is used and the reciprocal obligations that are entailed