Meanings
nounWolf number (plural Wolf numbers)
plural Wolf numbers
- A measure of the number of sunspots and groups of sunspots present on the surface of the Sun.
Synonyms: sunspot number, Zürich number
Synonyms & antonyms
nounA measure of the number of sunspots and groups of sunspots present on the surface of the Sun.
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Also see
Origin
The idea of compiling the information about the sunspot number from various observers originated with Rudolf Wolf in 1848 in Zürich, Switzerland.
Full word history & related roots →Cite this entry
APA
Wolf number. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Wolf%20number
MLA
“Wolf number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Wolf%20number. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Wolf number,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Wolf%20number.
Source: Wolf number on Wiktionary, CC BY-SA 4.0.