What is a tree bank?

Excuse me, could you please clarify what exactly a tree bank is? I've heard the term before, but I'm not entirely sure of its definition. Is it a type of financial instrument or perhaps a specific type of database? If it's a database, does it store information related to trees or forestry? Or does it have a completely different meaning in the world of finance and cryptocurrency? I'd appreciate it if you could provide a concise and straightforward explanation.