adjective. Suffering from motion sickness caused by travel in a motor vehicle.

adjective. feeling nauseous due to the movement of a car or other land vehicle; -- similar to airsick and seasick.

adjective. dizzy or feeling nauseated due to riding in a vehicle; suffering from motion sickness

adjective. experiencing motion sickness

""An unrestrained pet can be hugely distracting – if he is seeking your attention, putting his face right in front of yours, starts chewing up the upholstery or is vomiting because he is carsick," said Katherine Miller, director of applied science and research for the American Society for the Prevention of Cruelty to Animals."

ill  sick  

airsick  seasick