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Cryptocurrency and Blockchain Dictionary

A complete list of crypto definitions

Cryptocurrency and blockchain glossary

Commonly used terms in the world of blockchain and cryptocurrency

Terms commonly used in the world of blockchain and cryptocurrency

51% Attack

A ‘51% attack’ refers to a possible attack on a blockchain by a group of ‘miners’ who hold more than 50% of the hash rate. In such a situation the ‘miners’ have the possibility to deliberately not confirm transactions or to issue transactions twice.


It can be an individual or an organization that has more control over the crypto network. Hence, they can interfere with the working of a particular transaction by reverting it or alter the information. A 51% attack can also cause double-spending situations, not to mention there are many possible threats tailored with a majority attack.


Generating new crypto tokens easily, preventing the network to communicate effectively with blocks, stealing crypto assets, and increasing the block rewards limit are some of the possible problems that can result due to a 51% attack.


A ‘51% attack’ refers to a possible attack on a blockchain by a group of ‘miners’ who hold more than 50% of the hash rate. In...

Other Important Terms

Double Spending

With digital currency, there is a risk that the holder could make a copy of the digital token and se...

Block explorer

A block explorer is an online service to track blockchain transactions. It usually is a website wher...


Launched in 2015, Ethereum is the world's programmable blockchain. Like other blockchains, Ethereum...

Smart Contract

A smart contract is a computer program or a transaction protocol respectively, which is intended to...


There are tons of different cryptocurrencies available in the market. However, they are divided into...

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