Coin Glossary

You can find most popular coin collecting phrases in this coin glossary.

Coin Glossary

U

unc or unk or UN - abbreviation for uncirculated.

uncirculated or un-circulated - a new condition coin that does not have any sign of wear. Marks on the coin that may come from the manufacturing process do not keep a coin from being un-circulated. (Example, bag marks.) Even the slightest amount of wear or cleaning will keep a coin from grading uncirculated.

upsetting mill - machine used in coin production to raise the rim on both sides of a blank (planchet).

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Coin Collecting News
07/18/2025
Legendary analyst says Elon Musk’s favorite coin could jump 80%
Dogecoin, the meme coin once adored by Elon Musk, has jumped more than 10% over the last seven days, riding the crypto market rally as Bitcoin hit a record high of $123,091.61 early this week. A meme ... more info

07/18/2025
The Royal Mint Just Unveiled a Gorgeous New Coin—and It Features This Surprising Member of the Royal Family
It’s not every day that the Royal Mint drops a new coin, but today the very first U.K. coin honoring Princess Anne has debuted—and it’s to celebrate a significant milestone: Anne’s 75th birthday. (The ... more info

07/17/2025
Trump Just Got Almost $100 Million Richer Thanks to His Meme Coin
Beginning on Thursday, businesses affiliated with the president will be allowed to sell off 90 million of $TRUMP tokens, per the crypto-analytics firm Messari. In crypto, this is called an “unlock” — ... more info