What does the term "compact" mean, in cycling?

I was looking at bikes on the Specialized website and certain models of road bikes have the word "compact" included in their name. The Roubaix, for example has models called the "Roubaix Compact" and the "Roubaix Elite Apex Compact". What does "compact" mean? Does it mean... show more I was looking at bikes on the Specialized website and certain models of road bikes have the word "compact" included in their name. The Roubaix, for example has models called the "Roubaix Compact" and the "Roubaix Elite Apex Compact". What does "compact" mean? Does it mean they come in smaller sizes, because I need a larger bike.
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