English version

lower class in Sociology topic

From Longman Dictionary of Contemporary Englishlower classˌlower ˈclass noun [countable] (also lower classes [plural])  old-fashionedSSCLASS IN SOCIETY the social class that has less money, power, or education than anyone else. This is now considered offensive.working class, middle class, upper classlower-class adjective
Examples from the Corpus
lower classThen you got the beatnik, maybe a lower class of person.In college he loved a young girl of a lower class and ruined her; she died a suicide.Well, maybe, they could be, for once, treated just like their lower class brothers the football fans.Consequently, we propose to lower class sizes to 25 in the first three grades.His wife died from being too lower class.