Meanings
nounproton-proton chain (uncountable)
- uncountableastronomyA series of thermonuclear reactions partly responsible for energy production in stars by converting hydrogen into helium.
Synonyms: p-p cycle
Synonyms & antonyms
nounA series of thermonuclear reactions partly responsible for energy production in stars by converting hydrogen into helium.
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APA
proton-proton chain. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/proton-proton%20chain
MLA
“proton-proton chain.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/proton-proton%20chain. Accessed November 5, 2026.
Chicago
WatkinsX Dictionary, s.v. “proton-proton chain,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/proton-proton%20chain.
Source: proton-proton chain on Wiktionary, CC BY-SA 4.0.