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Definition of Copernican system noun from the Oxford Advanced American Dictionary

 

Copernican system

 noun
noun
NAmE//kəˈpərnɪkən ˌsɪstəm//
 
[singular]
 
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the theory that the sun is the center of the solar system, with the earth and other planets moving around it compare Ptolemaic system
See the Oxford Advanced Learner's Dictionary entry: Copernican system