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Definition of Sunspot
1. Noun. A cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field. 
Definition of Sunspot
1. a dark spot on the surface of the sun [n -S]
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1. Noun. A cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field. 
1. a dark spot on the surface of the sun [n -S]