Blockchain - arealive/Viper GitHub Wiki
A blockchain is fundamentally a public record of state changes. 1
A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block typically contains a hash pointer as a link to a previous block, a timestamp and transaction data...Blocks hold batches of valid transactions that are hashed and encoded into a Merkle tree.2
[1] https://media.consensys.net/time-sure-does-fly-ed4518792679