Non-fungible token.
And:
Or for a MUCH more detailed description:
Also definition of fungible:
“being something (as money or a commodity) one part or quantity of which can be substituted for another of equal value in paying a debt or settling an account oil, wheat, and lumber are fungible commodities”
From: https://www.merriam-webster.com/dictionary/fungible#:~:text=(Entry%201%20of%202),and%20lumber%20are%20fungible%20commodities.
The original concept of digital technology was that information could be copied, owned, shared by everyone and anyone. Blockchain technology has changed that. Now although information can be shared or copied, conceptinally it can be owned, by only one person, who may not be the creator of the information. I'm not sure if that's a good thing. In for long term