: a field test of the beta version of a product (such as software) especially by testers outside the company developing it that is conducted prior to commercial release    Definition of beta test from Merriam-Websters.com. (c) 2022. March 3, 2022

block·​chain | \ ˈbläk-ˌchān  \  noun a digital database containing information (such as records of financial transactions) that can be simultaneously used and shared within a large decentralized, publicly accessible network   also - the technology used to create such a databaseThe technology at the heart of bitcoin and other virtual currencies, blockchain is an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way.     — Marco Iansiti and Karim R. Lakhani               Definition of blockchain from Merriam-Websters.com. (c) 2022. March 3, 2022

is any form of currency that  exists digitally only, that usually has no central issuing or regulating authority but instead uses a decentralized system to record transactions in a blockchain ledger, manages the issuance of new units, and that relies on cryptography to prevent counterfeiting and fraudulent transactions