a period of five years.
Roman History. a lustration or ceremonial purification of the people, performed every five years, after the taking of the census.
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How to use lustrum in a sentence
Thus passed away two lustra of her life, and as yet my daughter remained nameless upon the earth.The Works of Edgar Allan Poe | Edgar Allan Poe
Lustra-cellulose prepared by spinning a solution of cellulose in concentrated chloride of zinc.
Concentrated nitric acid attacks the natural silks powerfully in the cold; the lustra-celluloses dissolve on heating.
The China silk was dissolved by this reagent; Tussah silk and the lustra-celluloses entirely resisted its action.
Millon's reagent, at the boiling solution, colours the natural silks violet: the lustra-celluloses give no reaction.
British Dictionary definitions for lustrum
a period of five years
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