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blow-by

blow-by (blow·by)

blow-by (blowby)

 
pronunciation:
blo baI
part of speech: noun
inflections: blow-bies, blowbies
definition 1: the leakage of unburned gases or of air mixed with fuel into the crankcase of an automobile engine, or the gases so leaking.
definition 2: a device attached to the crankcase that carries such gases back to the cylinders for combustion.