A Greek–English Lexicon, Henry George Liddell, Robert Scott, Henry Stuart Jones, Roderick McKenzie (editors). "ἀριστο-κρᾰτία, ἡ,
A, rule of the best, aristocracy, ἀ. σώφρων Th.3.82, cf. Henioch.5.17, Isyll.1, etc.; rule of the rich, Pl.Plt.301a. II ideal constitution, rule of the best, Arist. Pol.1293b1 sqq., EN1160a33, Pl.Mx.238c, 238d, Plb.6.4.3." http://logeion.uchicago.edu/%E1%BC%80%CF%81%CE%B9%CF%83%CF%84%CE%BF%CE%BA%CF%81%CE%B1%CF%84%CE%AF%CE%B1