Blockchain Terms

Below is a list of blockchain terms added by us and by our readers. If you have a question about one of these terms and would like to know more, drop us a line. If you would like to add a term or think there is an error, we want to hear from you.



Blockchain Term Glossary

Entries are below. If you would like to add a term or think there is an error with a blockchain term, contact us here. To see all terms, simply enter a % sign in the search box below and hit Enter.

Blockchain Terms

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
There are 2 names in this directory beginning with the letter U.
Uncle Blocks
Also known as an Ommer Block, this is a mined block that is considered stale and will not be added to the blockchain. This happens in the case where two blocks are found and an attempt is made to add the block to the blockchain at the same time. The second block is not added to the blockchain and the transactions in that block are not considered valid. Typically, the faster the blockchain, the higher the ratio of uncle blocks.
Unspent Transaction Outputs (UTXO)
Every transaction begins and ends with an Unspent Transaction Output. As a balancing tool, every transaction is confirmed as valid with a UTXO as the confirmation results in the removal of spent coins from the UTXO database. The Unspent Transaction Output is also what prevents double spends.
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