What does lustrāmentum mean in Latin?

lustrāmentum, a noun, means “a means of purification”.

noun

lustrāmentum

lustrāmentum, i, n. id.,

I. a means of purification, Arn. in Psa. 118, Serm. 8.

lustrāmentum, i, n. lustror,

I. an incentive to lust: si quis lustramenti causā dederit cantharides, Dig. 48, 8, 3.

What does lustrāmentum mean in Latin?: lustrāmentum, a noun, means “a means of purification”.