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prime rate
prime time
prime vertical
primer (1)
primer (2)
primera dama
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primum mobile

pri·mum mo·bi·le [ prməm mṓbə l, prməm mṓbə lày ] (plural pri·mum mo·bi·les)


noun 
Definition:
 
1. outermost sphere of universe: in Ptolemaic astronomy, the outermost sphere of the universe, thought to revolve every 24 hours, moving the inner spheres with it

2. philosophy 
Same as  prime mover (sense 2)


[15th century. < medieval Latin, "first moving thing"]
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