Bitcoin Cash

Bitcoin Cash (BCH) is a peer to peer electronic cash system. This means that payments can be sent directly from one party to another without going through a bank or third party. Peer to peer implies that either side can initiate a session and has equal responsibility. Bitcoin Cash is fast, cheap, reliable, stable, simple and secure. It is the most advanced form of cryptocurrency in the world. Enabling new economies with low fee micro-transactions, large business transactions, and permissionless spending.
Website: bitcoincash.org
Alternative website: bch.info

Blockchain

A Blockchain is an ongoing chain of hash-based proof-of-work. Cryptocurrencies are using a blockchain.
Wikipedia: Blockchain

Cryptocurrency

A Cryptocurrency is a distributed network and online payment system using a blockchain and strong encryption.
Wikipedia: Cryptocurrency

URI scheme

A URI scheme identifies a resource on the internet. There are URI schemes for Bitcoin Cash and Simple Ledger Protocol allowing for clickable payment links and payment handling in QR codes and other applications.
Wikipedia: Uniform Resource Identifier