Glossary

The terms these pages use, in the order they tend to come up rather than alphabetically.

The market

Pool: The contract holding both sides of a pair, against which every trade executes. On V3 it is its own contract with its own address; on V4 every pool lives inside one PoolManager and is identified by a poolId instead.
PoolManager: The single Uniswap V4 contract that holds every V4 pool on a network. A V4 pool has no address of its own, so tools written to point at one will not find it — read the state from the manager and a poolId instead.
poolId: The hash of a V4 pool’s parameters — its two tokens, fee, tick spacing and hook. It identifies the pool inside the PoolManager the way an address identifies a V3 pool.
Quote token: The side of the pair that is not your coin — the network’s wrapped native token. Prices, market caps and buy sizes are all denominated in it, which is why a number means something different on a chain whose native token is a dollar stablecoin.
Wrapped native token: An ERC-20 version of the token that pays for gas, because a pool can only hold ERC-20s. Wrapping and unwrapping is one-to-one and happens inside the trade.

Prices and trades

Tick: Uniswap’s unit of price. Each tick is a fixed 0.01% step, so a price is stored as a whole number of ticks rather than a decimal.
Tick spacing: How far apart the usable ticks are in a given pool. A 1% pool uses a spacing of 200, meaning liquidity can only be placed on every 200th tick — coarser positions, cheaper gas.
Pool fee: The percentage every swap pays to the pool. It is charged by Uniswap, not by Muup.fun, and is then split between the creator and the platform when it is claimed.
Slippage tolerance: The worst output you are willing to accept, written into the transaction. It is a floor, not a target: if the price moves past it the swap reverts and you keep your funds, minus gas.
Hook: A contract a V4 pool calls at fixed points in a swap. Muup.fun uses one to take the fee from the quote side of every trade, so a creator is never paid in their own coin — and it is what makes a creator tax and holder fee sharing possible at all, since both need the whole fee to land on one asset. A pool without a hook accrues fees in the position instead, in both tokens. The Networks page lists which chains have it.
Creator trade tax: An optional extra a creator adds on top of the pool fee at launch, up to 10% of the quote side, paid entirely to them. Written once and never changeable. A coin with one shows the total a trade costs, not the pool fee alone.
Holder fee sharing: A creator giving their entire share of trading fees to the people holding the coin, divided in proportion to what each holds. Computed on chain from the coin’s own balances, claimed by holders themselves, and irreversible — the entitlement moves to a contract at launch and no key can move it back.
Holder fee vault: The per-coin contract that receives a shared creator fee and lets each holder claim their part. It excludes the pool’s own liquidity, without which almost every fee would be credited to the pool rather than to holders. A coin that does not share fees has none.

Launching

Opening buy (dev buy): A purchase of your own coin made inside the launch transaction. Nothing can front-run it, because there is no block in which the pool exists and the buy has not happened.
Guard window: The first few blocks after a launch, during which no single wallet may hold more than a set share of supply. Both numbers are on the launching page, read from the factory.
Liquidity position: The NFT representing liquidity supplied to a pool. Here it is held by the factory permanently and cannot be withdrawn by anyone, which is what "liquidity locked" means.
Creation fee: A one-off charge for launching, in the network’s native token. Separate from gas, and separate from the trading fee — it is not a cut of anything your coin later earns.

A term that is missing usually means a page is explaining something it should be linking to instead — worth reporting.