between the aristocracy and the working class

petty bourgeoisie petite bourgeoisie bourgeois/bourgeoisie petit bourgeoisie petty-bourgeoisie
Definitions of Bourgeoisie on the Web:
The capitalist class. From the Communist Manifesto: "By bourgeoisie is meant the class of modern capitalists, owners of the means of social production and the employers of wage labor."www.workers.org/marcy/perestroika/glossary.html
in Marxist criticism, the property-owning and controlling class in conflict with the proletariat. The ruling class of a society from which ideologies take their shapes.www2.cumberlandcollege.edu/acad/english/litcritweb/glossary.htm
Originally, the inhabitants of a walled city, that is, merchants, craftsmen and professionals, such as doctors, lawyers and professors. In later usage, it was those members of the Third Estate who were not peasants. It has now come to mean any member of the middle class.campus.northpark.edu/history/WebChron/Glossary/Glossary.index.html
The capitalist class (see capitalism below) that came to be known as the middle class, between the aristocracy and the working class. A new middle class of merchants and businessmen prospered throughout Europe from the 16th century, and especially in Britain, which Napoleon described as a 'nation of shopkeepers'. The term 'bourgeois' is used derogatorily to describe anything considered humdrum, unimaginative and/or selfishly materialistic.www.channel4.com/history/microsites/H/history/browse/glossary.html
The middle class; in Marxist theory, the capitalist class, which is opposed to the proletariat, the lower or industrial working class.www.li.suu.edu/library/humtxt/glossary/glossary.htm
those who own property and the means of production; in Marxism, capitalists as a class (the source of society's problems).www.summit.org/resource/dictionary/
One of Marx’s opposed classes; owners of the means of production (factories, mines, large farms, and other sources of subsistence).highered.mcgraw-hill.com/sites/0072832258/student_view0/chapter15/key_terms.html
Term given to the middle class people in society.regentsprep.org/Regents/global/vocab/topic_alpha.cfm
French term referring to the owners of capital. In today's terms, they would be the owners of large businessesinstruction.blackhawk.tec.wi.us/ghoffarth/economicsglossary.htm
middle class: the social class between the lower and upper classes wordnet.princeton.edu/perl/webwn
Bourgeoisie (boorz'hwäz-ee´) in modern use refers to the wealthy classes in a capitalist society. It is a French word, derived from the Italian borghesia (from borgo, village, in turn from Greek pyrgos). A borghese, then, was a freeman of a burgh or town. The word evolved to mean merchants and traders, and later on referred to all persons in the broad socioeconomic spectrum between nobility and serfs. en.wikipedia.org/wiki/Bourgeoisie