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primum mobile

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noun pri·mum mo·bi·le \ˈprī-məm-ˈmō-bə-lē, ˈprē-\

Definition of primum mobile

plural

primum mobiles

  1. :  the outermost concentric sphere conceived in medieval astronomy as carrying the spheres of the fixed stars and the planets in its daily revolution



Origin and Etymology of primum mobile

Middle English, from Medieval Latin, literally, first moving thing


First Known Use: 15th century


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of or relating to the heavens

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