A portmanteau of [i][[car|automobile]][/i] and [i][[motorcycle]][/i].  It is a US legal term referring to [[three-wheeler]]s that feature car-like steering, car-like passenger seating, and some degree of passenger compartment.  In the US they can not legally be classified a car, but a classification was needed to cover car-like three-wheelers that are different from motorcycle-like three-wheelers.

h4. External links

* "Wikipedia: Three-wheeler - Registration":[https://en.wikipedia.org/wiki/Three-wheeler#Registration]
autocycle