primum mobile
The term "primum mobile" originates from medieval and Renaissance cosmology and philosophy, describing the outermost sphere of the heavens or the primary cause of motion.
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Definition
C2Astronomy
(historical, technical)In medieval cosmology, the outermost celestial sphere believed to drive the motion of all inner spheres.
Example
- In Ptolemaic astronomy, the primum mobile was thought to complete a revolution every 24 hours.
C2Philosophy
(theological, academic)The initial cause or prime mover that sets everything else in motion.
Example
- Aristotle's concept of the primum mobile influenced many medieval philosophers.
C1General
(figurative)The main impetus or driving force behind an action.
Example
- She was the primum mobile behind the charity event's success.
Similar
Terms that have similar or relatively close meanings to "primum mobile":