What does velodrome mean?

Can you explain what the term "velodrome" refers to, and what context it is typically used in? I'm curious to know if it's related to a specific sport or activity, and if there are any notable examples of velodromes that might help me better understand the concept. Is it a physical structure, or does it have a more abstract meaning? I'm eager to learn more about this term and how it's used in the world of finance or cryptocurrency, if applicable.