Authenticum
Defined in 3 dictionaries — Ballentine's (1916), Black's (1910), Kinney (1893)
Ballentine's Law Dictionary
James A. Ballentine · 1916
(Civil Law) An original document as distinguished from a copy.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
In the civil law. An original instrument or writing; the original of a will or other instrument, as distinguished from a copy. Dig. 22, 4, 2; Id. 29, 3, 12.
A Law Dictionary and Glossary
George C. Kinney · 1893
I.
In the civil law. Original.