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PCV abbreviation of "positive crankcase ventilation," the flow of engine exhaust fumes into an auto engine's cylinders as part of a pollution control system.
PCV valve a one-way valve that regulates the flow of engine exhaust fumes into an auto engine's cylinders, as part of a pollution control system.
racecar an automobile used in auto racing.
rally1 a long distance auto race over public roads. [1/12 definitions]
transverse of an auto engine, mounted with the crankshaft sideways. [1/2 definitions]