Stablecoin
A cryptocurrency pegged to a stable asset, most often the US dollar. It is used to avoid volatility and to settle transactions within the crypto market (examples: USDT, USDC).
See also
Gas fee
The fee paid for executing a transaction or smart contract on a blockchain network such as Ethereum. The gas amount depends on network congestion — the busier the network, the more expensive a transaction becomes.
Gwei
A tiny denomination of ether (ETH) commonly used to express gas fees. One ETH equals one billion gwei.
Altcoin
Any cryptocurrency other than Bitcoin. The term covers thousands of projects — from Ethereum and Solana to small niche tokens.
DeFi
Decentralized Finance — an ecosystem of blockchain applications (lending, trading, insurance) that operates without banks or other traditional intermediaries.
NFT
A Non-Fungible Token — a unique blockchain record that certifies ownership of a specific digital or physical item, such as artwork, music, or a ticket.
DEX (decentralized exchange)
An exchange where trades happen directly between users via smart contracts, without a central operating company and without depositing funds with a third party.