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solar cycle: Meaning and Definition of

so'lar cy'cle

Pronunciation: [key]
— Astron. Astron.
  1. the variation of sunspots, prominences, flares, and other solar activity through an 11-year cycle. Also calledCf.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
solar constant solar day
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