moveable, any thing susceptible of motion, or that is disposed to be moved either by itself or by some other prior mobile or mover.

Primum Mobile, in the ancient astronomy, was a ninth heaven or sphere, imagined above those of the planets and fixed stars. This was supposed to be the fifth Mobile, first mover, and to carry all the lower spheres round Mocho along with it; by its rapidity communicating to them a motion whereby they revolved in 24 hours. But the diurnal revolution of the planets is now accounted for without the affluence of any such primum mobile.

Perpetuum Mobile. See Perpetual Motion.