Pronunciation: (ig-zôst'gas"), [key] Auto.
a method of returning part of the exhaust gases to an engine by means of a valve (EGR valve) in order to reduce the combustion temperature, which leads to a reduction in the formation of pollutants. Abbr.: EGR
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.