Astron.
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.
Cf. solar cycle .
Astron.
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.
Cf. solar cycle .
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012