DEX (Decentralized Exchange)
A cryptocurrency exchange that operates through smart contracts, allowing users to trade directly without an intermediary.
DEXs like Uniswap, Curve, and Aerodrome let you swap tokens directly from your wallet. There's no account to create, no KYC, and no company holding your funds. You connect your wallet, approve the swap, and the smart contract executes the trade.
DEXs use liquidity pools instead of order books. Liquidity providers deposit token pairs (like USDC/ETH) into pools, and traders swap against them. The exchange rate is determined by a mathematical formula based on the pool's balance.
DEXs are useful for swapping between tokens, but they're not ideal for converting USDC to fiat currency. For that, you still need a centralized exchange (CEX) or offramp service.
Related Terms
CEX (Centralized Exchange)
A cryptocurrency exchange run by a company that holds your funds and matches buy/sell orders. Examples: Coinbase, Kraken, Binance.
Swap
Exchanging one cryptocurrency for another, typically done through a DEX or exchange.
Liquidity Pool
A smart contract holding paired tokens (like USDC/ETH) that enables trading on a decentralized exchange.
Slippage
The difference between the expected price of a trade and the actual price you receive when the trade executes.
DeFi (Decentralized Finance)
Financial services built on blockchain smart contracts that operate without traditional intermediaries like banks.
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This definition is provided for educational purposes. USDC.org is an independent resource and is not affiliated with Circle Internet Financial.