lustrum
lust·rum
noun
2.
a ceremonial purification of the Roman population every five years following the census
Origin
From Latin lūstrum.
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.