Term: second estate: the nobility in France and the peerage in Britain
Broader: estate of the realm: a major social class or order of persons regarded collectively as part of the body politic of the country (especially in the United Kingdom) and formerly possessing distinct political rights | Unrelated: fehling's solution: a liquid solution of copper sulfate and potassium tartrate and sodium hydroxide that is used to test for sugar in the urine; solution turns reddish when sugar is present