A premature explosion in the cylinder of a gas or oil engine during the exhaust or the compression stroke, tending to drive the piston in a direction reverse to that in which it should travel; also, an explosion in the exhaust passages of such ah engine
{i} cast iron lining placed behind a fireplace, area of the wall where such lining is placed; (Zoology) one of the many species of pheasants that have a bright blazing red lower back