Meanings
proper noun
- One of the hydrogen spectral series.
Origin
Discovered in 1953 by American physicist Curtis J. Humphreys.
Full word history & related roots →Cite this entry
APA
Humphreys series. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Humphreys%20series
MLA
“Humphreys series.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Humphreys%20series. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “Humphreys series,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Humphreys%20series.
Source: Humphreys series on Wiktionary, CC BY-SA 4.0.