Apparently! I did not expect such a nice find after asking search engine this:

https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=1700041

> There are two main types of single-wheeled vehicles. In a unicycle, the rider sits above the wheel. These vehicles are recognizable by most people. Less well known is the monocycle, where the rider sits inside the wheel.

The famous South Park episode was a monocycle!

https://en.wikipedia.org/wiki/The_Entity_%28South_Park%29

yeah likewise the dicycle has two big wheels side by side haha

Axel from the Twisted Metal video games drove a dicycle!

You must have missed this: https://news.ycombinator.com/item?id=40080406