noun
: either of two zones within which nearly all sunspots occur:
a. : a zone north of the solar equator between 10 degrees and 30 degrees in solar latitude
b. : a zone correspondingly south of the solar equator
noun
: either of two zones within which nearly all sunspots occur:
a. : a zone north of the solar equator between 10 degrees and 30 degrees in solar latitude
b. : a zone correspondingly south of the solar equator
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012