Meanings
noun
- spectroscopyastronomyThe correlation between the measured width of the calcium II K emission line and the absolute visual magnitude of a star.
Origin
Named after Olin Chaddock Wilson and Vainu Bappu.
Full word history & related roots →Cite this entry
APA
Wilson-Bappu effect. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Wilson-Bappu%20effect
MLA
“Wilson-Bappu effect.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Wilson-Bappu%20effect. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Wilson-Bappu effect,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Wilson-Bappu%20effect.
Source: Wilson-Bappu effect on Wiktionary, CC BY-SA 4.0.