Système de la Nature, a book, the authorship of which is ascribed to Baron Holbach (q.v.), which appeared in 1770, advocating a philosophical materialism and maintaining that nothing exists but matter, and that mind is either naught or only a finer kind of matter; there is nowhere anything, it insists, except matter and motion; it is the farthest step yet taken in the direction of speculative as opposed to political nihilism.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Syrus, Publius * Syzygy