What is the term used when the wheels still rotate, but control over the vehicle is lost?

The term that best describes a situation where the wheels are still rotating but control over the vehicle is lost is a "skid." A skid occurs when the tires lose traction with the road surface, typically due to excessive speed, sudden steering maneuvers, or adverse weather conditions, while the wheels continue to turn. This loss of traction means the vehicle can slide uncontrollably in any direction, making it difficult for the driver to maintain steering control.

In contrast, terms like "power slide" typically refer to a controlled drift, often used in motorsports where the driver intentionally oversteers while still retaining some level of control. "Slide" is a more generic term and does not specifically describe the loss of control with rotating wheels. An "incipient spin" refers to the early stage of a spin where the vehicle is about to lose complete control but may not necessarily indicate that the wheels are still rotating while the control is lost. Thus, "skid" accurately describes the condition where control is compromised while the wheels remain in motion.