The terms and abbreviations defined in this glossary are derived from the use of the Across Protocol Bridge, and also from any concepts that surround or support its use.

• Click the arrow for the glossary usage instructions**.**

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ****

A

• **Across Protocol—**Across Protocol is a novel bridging method that combines an Optimistic Oracle, bonded relayers, and single-sided liquidity pools to provide decentralized instant transactions from L2 to L1 Ethereum. [audio available, click the arrow]

• **Arbitrum—**is a Layer 2 solution designed to improve the capabilities of Ethereum smart contracts, boosting their speed and scalability, while adding additional privacy features. [audio available]

• A—

• A—

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B

• **Bridge Administrator—**The contract that controls bridge fees and pools that would be added.

• **Bridge Deposit Box—**This is the contract where the the user deposits the L2 tokens I.E USDC, WETH ..

• **Bridge—**A blockchain bridge (which is usually just called a 'bridge') is a connection that allows you to transfer tokens or other data from one blockchain or network to another blockchain or network, in order to use the decentralized applications on the blockchain that you're transferring the tokens to.

• Bridge Architecture— [video available, click the arrow]

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C

• **Canonical bridge—**The canonical bridge is used to move funds between L2 and L1. This takes a minimum of one week.
• C—