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blow-by



Pronunciation: (blō'bī"), [key]
n.,
pl. -bies.
Auto.
1. leakage of the air-fuel mixture or of combustion gases between a piston and the cylinder wall into the crankcase of an automobile.
2. a device, fitted to a crankcase, for conducting such gases back to the cylinders for combustion. Also,blow'by".

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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