Definition of "sun-spot" []

• One of the dark patches, from 1,000 to 100,000 miles in diameter, which are often visible upon the photosphere. (noun)
• A freckle. (noun)
• A spot on leaves produced by excessive heat of the sun. Compare heliosis, 1. (noun)

The Century Dictionary (Public Domain)

• "The dangers to the planet Earth are more from the coming sun-spot activity that is about to hit us in five to ten years, if not sooner."
• "It is singularly ironic that whereas warm-mongers try to ridicule sun-spot cycles as an influence on temperature increase, now that the upwards trend in temperature has ceased, they are turning to the unusual absence of such sun-spot activity as an excuse for the fact that global warming has indeed ceased."
• "For Wolfs information, which you might refer to NASA or Greenwich Observatory to confirm, it has been known for over a century that the Earths climate fluctuates in direct response to sun-spot activity, the so called "Maunder Cycle"."