LATIN DICTIONARYLexicon Latīnum
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“lustration” in Latin

The English word lustration itself goes back to Latin lūstrum, through lustratio.

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

lustration
lustrum (made by the censor, on going out of office, on behalf of the whole people): piaculum (sacrifice offered for expiation): lustratio (purification by offerings, Liv., 40, 6).

Quick answer

What is the Latin word for lustration?
The usual Latin words for “lustration” are lustrum, piāculum, lūstrātiō. 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.