OLIGARCH
oligarch
(noun) one of the rulers in an oligarchy
Source: WordNet® 3.1
Etymology
Noun
oligarch (plural oligarches)
A member of an oligarchy; someone who is part of a small group that runs a country.
(especially, Russia, USA, Europe, or China) A very rich person, particularly with political power; a plutocrat.
Synonyms: plutocrat, tycoonocrat
(cosmogony) A protoplanet formed during oligarchic accretion.
Source: Wiktionary
Ol`i*garch, n.
Definition: A member of an oligarchy; one of the rulers in an oligarchical
government.
Source: Webster’s Unabridged Dictionary 1913 Edition