primum mobile

This was believed to turn all the others, and was called the primum mobile.

No, I of only I want you to tell us what was the primum mobile in the matter.

In all these cases the primum mobile is the making of a livelihood.

“Hellgate” is now the orifice in the primum mobile towards the empyrean.

I need not say that your correspondent is quite right in referring the words first moved to the primum mobile.

Here it clearly refers to the primum mobile; it often applies to the whole expanse of the heavens.

The primum mobile of the new system was Motion, in distinction from the Rest which marked the old monastic retreats.

In this effort lies its only possible unity, its primum mobile, its one clearly defined object from beginning to end.

Hostility to the foreigner is the primum mobile of their local policy.

I mentally exclaimed; “I have found the primum mobile of the circulation of the blood.”