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sunspot cycle

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noun Astronomy.
the cycle, averaging in duration slightly more than 11 years, in which the frequency of sunspots varies from a maximum to a minimum and back to a maximum again.
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Compare solar cycle.

Words nearby sunspot cycle

sunsick, sun sign, sunspace, sun spider, sunspot, sunspot cycle, sunspots, sun star, sunstone, sunstroke, sunstruck
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use sunspot cycle in a sentence

  • The sunspot cycle has appeared to average 11.2 years in length, and has been called the 11-year cycle.

    Climatic Changes|Ellsworth Huntington

  • The last sunspot cycle had the highest maximum of any since 1780, but the present cycle bids fair to set an all time record.

    Disturbing Sun|Robert Shirley Richardson

  • Also the present sunspot cycle started its rise to maximum about 1954.

    Disturbing Sun|Robert Shirley Richardson
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