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Crypto glossary

The terms you’ll meet in crypto, explained in plain language.

A
  • APY

    Annual percentage yield: the yearly return including compounding.

  • Address

    A public string where crypto can be received, derived from a public key.

  • Airdrop

    Free tokens distributed to wallet holders, often to promote a new project.

  • Altcoin

    Any cryptocurrency other than Bitcoin.

B
  • Blockchain

    A shared, append-only ledger maintained by a network of computers.

  • Bridge

    A service that moves a token from one blockchain to another.

C
  • Cold storage

    Keeping private keys on a device or system that is not connected to the internet.

  • Confirmation

    A block added on top of the one containing your transaction.

  • Custodial wallet

    A wallet where a service holds the keys on your behalf.

D
  • DeFi

    Decentralised finance: financial apps that run on smart contracts.

  • Derivation path

    The route an HD wallet follows to turn one seed into many keys.

  • Destination tag

    An extra number some networks need to route a deposit to the right account.

E
  • ERC-20

    The token standard on Ethereum and EVM-compatible chains.

  • Exchange

    A platform where you buy, sell or swap crypto.

G
  • Gas

    The fee paid to process a transaction on Ethereum-style networks.

H
  • Halving

    A scheduled cut in the new-coin reward for Bitcoin miners.

  • Hash

    A fixed-length fingerprint of data produced by a one-way function.

  • Hot wallet

    A wallet whose keys are on an internet-connected device.

K
  • KYC

    Know your customer: identity checks required by many financial services.

L
  • Layer 2

    A network built on top of a blockchain to make it faster and cheaper.

M
N
  • NFT

    A non-fungible token: a unique token representing a specific item.

  • Network fee

    What the blockchain charges to include your transaction.

P
  • Private key

    The secret number that authorises spending from an address.

  • Public key

    The shareable half of a key pair, used to derive addresses.

S
  • Seed phrase

    Twelve or twenty-four words that back up an entire wallet.

  • Self-custody

    Holding your own keys rather than trusting a service with them.

  • Smart contract

    Code deployed on a blockchain that runs exactly as written.

  • Stablecoin

    A token designed to hold a steady value, usually one US dollar.

  • Staking

    Locking coins to help secure a proof-of-stake network in exchange for rewards.

T
V
W
  • Wallet

    Software or hardware that manages keys and shows balances.

  • Whale

    An address or holder with a very large balance.

Y
  • Yield

    Income earned on a crypto holding.

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