One of the British novels with the highest sales hopes before Christmas is lustrum by Robert Harris.
According to Plutarch, a cat placed in a lustrum denoted the moon, illustrating the mutual symbology.
When the lustrum was finished, the consuls set out for their provinces.
The lustrum was closed, and the number of citizens amounted to four hundred and fifty thousand.
And yet I felt quite happy, in spite of the tenth lustrum so near at hand for me.
These were the twenty-sixth pair of censors since the first institution of that office; and this the nineteenth lustrum.
The lustrum was closed by the censors: the number of citizens was three hundred and twenty-three thousand.
Your present lustrum is not a fortunate one; but it has nearly expired, and better days are at hand.
Then I sicken at the idea of having Strauss in my head and on my hands for a lustrum, instead of saying good-bye to him in a year.
They were elected once every five years, this period being called a lustrum.
(plural lustra), "purification of the Roman people every five years," 1580s, from Latin lustrum, perhaps from root of luere "to wash," related to lavere (see lave). Or [Watkins, Klein] from PIE *leuk-stro-, from base *leuk- "light, brightness."