# Transaction ID (TXID) also written as "**txid**" 1. Is an abbreviation for ‘transaction id’ – this is a [[Hash|hash]] that is used by both humans and the [[Protocol(s)|protocol]] to reference [[Transaction(s)|transactions]]. 3. Transaction ID also referred to as a Transaction [[Hash|hash]]. This is a [[Transaction(s)|transaction]] identifier used to reference transactions on a [[Blockchain|blockchain]]. Below is an example from an [[Ethereum (blockchain)]] blockchain explorer (https://www.blockchain.com/eth/address/0xb2930b35844a230f00e51431acae96fe543a0347)