Monomania
A Dictionary of Law · Henry Campbell Black · 1891
A Dictionary of Law
In medical jurisprudence. Derangement of a single faculty of the mind, or with regard to a particular subject, the other faculties being in regular exerciss, Monopolia dicitur, cum unus solus aliquod genus mercaturs universum emit, pretium ad suum libitum statuens.
11 Coke, 86.
It is said to be a monopoly when one person alone buys up the whole of one kind of commodity, fixing a price at his own pleasure,