In essence, a buyback is when a project, or company, uses its own resources to repurchase some amount of its tokens from the open market. The repurchased assets, in the case of Neuron Fund, are then distributed to governance token holders.
An option is a contract which conveys its owner, the holder, the right, but not the obligation, to buy or sell an underlying asset or instrument at a specified strike price prior to or on a specified date, depending on the form of the option.
Decentralized finance (commonly referred to as DeFi) is an experimental form of finance that does not rely on financial intermediaries such as brokerages, exchanges, or banks, and instead utilizes blockchains, most commonly the Ethereum blockchain.
Users providing liquidity (funds/assets) on Neuron, Curve or other DeFi protocols.
Metamask is an Ethereum wallet that allows you to interact with Neuron and other dapps. You can also use it with Ledger and Trezor hardware wallets. It's the most popular Ethereum web wallet and is available as an add-on for most browsers.
Stablecoins are cryptocurrencies that attempt to peg their market value to some external reference. Stablecoins may be pegged to a currency like the U.S. dollar or to a commodity's price such as gold.