a. Also -ean. [f. Justinian, proper name + -IAN; Justinianean is f. late L. Jūstiniāne-us + -AN.] Of or pertaining to Justinian, Emperor of the East 527–65.

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  Justinianian code, a compilation of the best Roman laws made by order of Justinian, published in 529 and, in a revised form, in 534; also used as a general name for all the compilations of Roman law made by Justinian’s command, including the pandectæ, institutiones, and novellæ: see DIGEST, INSTITUTE, NOVEL.

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1826.  C. Butler, Grotius, Introd. 32. The language and spirit of the Justinianean code.

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1880.  Muirhead, Gaius, Introd. 9. Comparison of the Justinianian Institutes with passages in the Digest … showed … that in several places the later work was a literal transcript of the earlier. Ibid. The authors of the Justinianian compilation.

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