UTXO and POW meaning

[Black Arrow]

In browsing some of the development posts I repeatedly come across these acronyms, but I haven't seen any definitions either here or on the wiki. I gather that UTXO means something like the total blockchain. Does anyone know what these acronyms stand for?

[midnightlightning]

UTXO: Unspent Transaction-Out. Those are the important parts of the blockchain that indicate coins that are currently held by a given address. Spent transaction-outs maintain the history of those "active" coins.

[John (John K.)]

POW: Proof-of-work (or prisoner of war  )

[decryptionary]

I haven't defined UTXO yet, but I've got POW broken down in a simple definition at:
https://decryptionary.com/dictionary/proof-of-work/

Would appreciate your feedback on this. Decryptionary is my passion project, it's got 200+ definitions, walkthroughs to help you participate and more.