Definition
A Latin term from Roman civil law designating a son's wife — that is, a daughter-in-law. The term identifies a specific familial relationship within the agnatic family structure of Roman law, where precision in naming kinship ties carried legal significance for purposes of succession, intestate inheritance, and the rights and duties of family members toward one another.
Why It Matters in Research
Nurus appears primarily in texts drawn from or commenting on Roman civil law, particularly in the context of the Digest (Corpus Juris Civilis). Researchers encountering the term in historical legal sources should recognize it as a term of art in Roman family law, not a concept that carries direct force in common law jurisdictions. Its appearance in English-language legal dictionaries reflects the heavy civilian influence on early Anglo-American legal scholarship, where Latin terminology from Roman sources was routinely imported into legal reference works even when the underlying doctrine had no parallel in English law.
The practical research trap: nurus does not appear as an operative term in American or English statutes or case law. If the term surfaces in a primary source, it almost certainly signals that the author is drawing on Roman civil law authority, a continental treatise, or a work of comparative jurisprudence. Researchers should follow that thread into civilian sources rather than common law precedent.
The term also matters in succession and inheritance research. Roman law drew careful distinctions among degrees of kinship, and nurus appears in the Digest precisely in passages concerning who takes in intestacy and in what order. Burrill's citation to Digest 38.10.4.6 and 50.16.50 points researchers directly to the relevant passages — the former concerning degrees of cognation for inheritance purposes, the latter a definitional passage in the Digest's title on the meaning of words (De verborum significatione). The 50.16 locus is particularly useful because it functions as Roman law's own internal glossary, and nurus is defined there in that context.
For genealogical and historical legal document research, the term may appear in Latin instruments — wills, marriage settlements, family agreements — drafted under civilian influence, particularly in Louisiana, Quebec, or other mixed jurisdictions, or in ecclesiastical records.
Historical Dictionary Support
The three source dictionaries are in full agreement: nurus means a son's wife, or daughter-in-law, in Roman civil law. Black's (both editions) and Burrill's offer materially identical definitions. The slight variation is that Burrill's adds the parenthetical Latin gloss filii uxor (wife of the son) and, more valuably, supplies the specific Digest citations that allow researchers to locate the term in its original Roman law context. Black's attributes its definition to Calvin — a reference to the influential sixteenth-century jurist and lexicographer Johannes Calvin (Calvinus), whose Lexicon Juridicum was a standard reference for Latin legal terminology. Neither edition of Black's provides the Digest citations, making Burrill's the marginally more useful source for researchers who need to trace the term to primary Roman law authority.
None of the source dictionaries address any common law application of the term, nor do they discuss how nurus interacts with modern statutory definitions of "daughter-in-law" in inheritance or family law codes. That gap is expected — the term is a civilian relic in English-language legal dictionaries, preserved for its Roman law significance rather than for any ongoing doctrinal function.
Jurisdictional Note
Nurus has no operative legal significance in American common law jurisdictions. In Louisiana, with its civilian heritage, Roman family law terminology retains greater contextual relevance, though modern Louisiana statutes use ordinary English and French-derived terminology rather than classical Latin. Researchers working in mixed civil law jurisdictions or with pre-modern legal instruments should be alert to the term.