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solar cycle


noun Astronomy.

the variation of sunspots, prominences, flares, and other solar activity through an 11-year cycle.

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Nearby words

solar cells, solar chariot, solar cheilitis, solar collector, solar constant, solar cycle, solar day, solar eclipse, solar elastosis, solar energy, solar flare
Compare sunspot cycle.
Also called solar activity cycle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019