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socius

noun
so·​ci·​us | \ˈsōshēəs\
plural socii\ -​ēˌī \

Definition of socius 

1 : associate, colleague was procurator and socius to the vice-provincial— R. J. Purcell specifically, capitalized : the divine friend and companion of man

2 : a unit in social relationships consisting of an individual

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History and Etymology for socius

Latin

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