• synonyms

solar cycle

See more synonyms for solar cycle on Thesaurus.com
noun Astronomy.
  1. the variation of sunspots, prominences, flares, and other solar activity through an 11-year cycle.
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Compare sunspot cycle.
Also called solar activity cycle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018