Definition of sunspot in English:

sunspot

noun

Astronomy
  • A spot or patch that appears from time to time on the sun's surface, appearing dark by contrast with its surroundings.

    • ‘It went on to warn that further flares are likely in the next week, and because the sunspot is moving into line with Earth, the risk of disruptions is even greater as the solar activity will strike the planet head-on.’
    • ‘Between the mid-sixteenth and seventeenth centuries, the sunspot cycle shut down, reducing solar output by a mere 0.25 percent.’
    • ‘He also used his telescope to discover the four largest satellites of Jupiter, the phases of Venus, and sunspots on the sun.’
    • ‘He developed a great interest in broadcast noise, especially during sunspots.’
    • ‘For example, magnetic fields could be added to global simulations of solar convection to address the operation of the dynamo that drives the sunspot cycle.’

Pronunciation

sunspot

/ˈsʌnspɒt/