太たい陽よう周しゅう期きMeanings1nounsolar cycleastronomy›Astronomical term referring to the approximately 11-year cycle of solar activity, including sunspot frequency.太たい陽よう周しゅう期きは約やく11年ねんごとに極きょく大だいを迎むかえる。The solar cycle reaches its maximum about every 11 years.
