pace carEnglishOxford New American Dictionarypace car /ˈpās ˌkär, ˈpeɪs ˌkɑr/ ▸ noun Motorsports a car that sets the pace and positions racers for a rolling start in a warm-up lap or laps before a race, or that returns to control the pace in temporarily hazardous conditions.
EnglishOxford New American Dictionary
