blockchain

How blockchains actually work: blocks, nodes, consensus, forks and the networks behind the coins you can buy in Iraq. Written for readers who want the mechanics explained plainly, without hype.

Crypto Glossary 100 terms

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What Is Blockchain? A Beginner’s Guide

September 9, 2026

Block

An immutable digital file which stores information regarding activity on the network. Each block has its own timestamp, hash, and set of transactions. Full definition

Genesis Block

The first block of data ever processed and validated on a given blockchain, often called block 0 or block 1. Full definition

A Short History of Cryptocurrency: From Bitcoin to Stablecoins

September 9, 2026

Node

A computer or device that connects to a cryptocurrency network and helps strengthen the network’s resilience. Full definition

Block Height

The number of blocks in the chain between a given block and the first block on that blockchain (the genesis block, or block 0). Full definition

Decentralized Autonomous Organization (DAO)

A system of hard-coded rules, governed by blockchain-based smart contracts, that defines which actions a decentralized organization will take. Full definition

Lightning Network

A second layer operating on top of a blockchain, enabling increased transaction speed among participating nodes. One proposed scaling solution. Full definition

Fork

A split in a blockchain’s protocol that creates an alternate version of the chain, resulting in two blockchains running simultaneously. Full definition