suus et necessarius heres
noun
su·us et ne·ces·sa·ri·us he·res
| \ ˈsüəˌsetˌnekəˈsärēəsˈhāˌrās\
Definition of suus et necessarius heres
: a family heir including a slave in the paternal power of a decedent at the latter's death who by Roman law becomes sui juris and succeeds to the decedent's property by intestacy or by will
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