The smallest unit of Ether; 1 ETH = 10^18 wei.
Wei is the base unit used for accounting in Ethereum-style systems. Gas costs and balances are often measured in wei or gwei to avoid floating point errors.
"A 0.01 ETH transfer equals 10,000,000,000,000,000 wei (1e16 wei)."
All terms and definitions may update as the Cryptionary improves.