Deism

From French dÃ©isme, from Latin deus ("god, deity") + -ism.

Full definition of deism

(plural deisms)

A philosophical belief in the existence of a god (or goddess) knowable through human reason; especially, a belief in a creator god unaccompanied by any belief in supernatural phenomena or specific religious doctrines.

1682, John Dryden, Religio Laici, Or A Layman's Faith:If my supposition be true, then the consequence which I have assumed in my Poem may be also true; namely, that Deism, or the principles of natural worship, are only the faint remnants or dying flames of reveal'd religion in the posterity of Noah.
1847, Julius Charles Hare & Augustus William Hare, Guesses at Truth, p.39:As the Epicureans had a Deism without a God, so the Unitarians have a Christianity without a Christ, and a Jesus but no Saviour.
2009, Diarmaid MacCulloch, A History of Christianity, Penguin 2010, p. 786:In place of the idea which runs through the Tanakh and New Testament of a God intimately involved with his creation and providentially repeatedly intervening in it, there was the concept of a God who had certainly created the world and set up its laws in structures understandable by human reason, but who after that allowed it to go its own way, precisely because reason was one of his chief gifts to humanity, and order a gift to his creation. This was the approach to divinity known as deism.

The word is often capitalized when referring to the rise of such beliefs in 17th and 18th century Europe and America.