LATIN DICTIONARYLexicon Latīnum
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“memorandum” in Latin

The English word memorandum itself goes back to Latin memor, through memorandum.

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

memorandum
nota: memorandum book, liber memorials (Suet.); commentarius (Cic.); commentarium: to enter in a memorandum book, in commentarium referre; aliquid memoriae causa referre in libellum.

Quick answer

What is the Latin word for memorandum?
The usual Latin words for “memorandum” are nōtus, memorō, līber; also commentārius. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.