What does Sui actually mean?

Could you elaborate on the term "Sui"? I'm curious to understand its specific meaning in the context of cryptocurrency or finance. As a professional in this field, I'm often confronted with new terminologies, and "Sui" is one that has piqued my interest. Is it a new type of blockchain protocol? A decentralized finance tool? Or perhaps it refers to a specific cryptocurrency? I'd appreciate a clear and concise explanation to help me better grasp its significance in the industry.