/prddee"moom moh"bi le'/ ; Eng. /pruy"meuhm mob"euh lee', pree"-/ , Latin.
1. (in Ptolemaic astronomy) the outermost of the 10 concentric spheres of the universe, making a complete revolution every 24 hours and causing all the others to do likewise.
2. See prime mover .
[ lit., first moving (thing) ]