What does "Nonce" Mean?

Thank you.

It’s late in the day and my brain is full. Now I’m wondering over the difference between a cryptographic nonce and a hapax legomenon.

A nonce is only used once. A hapax legomen is only found once.

Ahhh. Thank you.

I was familiar with the cryptographic term, but also the “silly idiot” meaning you are talking about. I’m American, but I probably encountered the latter in British TV. The child molester/sex offender meaning is new to me.

I wonder if ol’ Baader-Meinhof is gonna visit me this week.