Definition of idem
: the same as something previously mentioned —used chiefly in bibliographies
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Origin and Etymology of idem
Middle English, from Latin, same — more at identity
First Known Use: before 12th century
Law Dictionary
Additional Notes on idem
Idem is usually used in the form of its abbreviation id. In Bally, the plaintiff also claimed…403 Mass. at 720-21. The [court] denied the claim…Id. at 721 — R. T. Gerwatowski
Origin and Etymology of idem
Latin, same
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