Before revision: The term "unicycle " is often used in robotics and control theory to mean a generalised cart or car moving in a two-dimensional world; these are also often called "unicyle-like" or "unicycle-type" vehicles.
After revision: The term unicycle is often used in robotics and control theory to mean a generalised cart or car moving in a two-dimensional world; these are also often called "unicyle-like" or "unicycle-type" vehicles.