reionization

R1E1I1O1N1I1Z10A1T1I1O1N1

noun

The act or process of reionizing.

Similar
Age of ReionizationEpoch of ReionizationEra of ReionizationReionization AgeReionization EpochReionization Era
OriginEnglish ionization ← Ancient Greek ἰόν (ión) ← Proto-Hellenic *éimi →
UncommonScrabble 21
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Meanings

reionization1

nounreionization (plural reionizations)

plural reionizations

  1. The act or process of reionizing.
  2. astrophysicsThe process by which the plasma of electrons and protons is produced after the Big Bang, when stars and galaxies ionized neutral hydrogen, or the era in which this occurs.

Reionization2

proper noun
  1. astronomyThe epoch of reionization of the Universe, where matter decoupled from energy, and space became transparent to radiation. One of the Ages of the Universe. The cosmic era when ultraviolet radiation of the first (Population III) stars and quasars ionized neutral hydrogen, ending the Cosmic Dark Age(s).

    Synonyms: Age of Reionization, Epoch of Reionization, Era of Reionization, Reionization Age, Reionization Epoch, Reionization Era

Synonyms & antonyms

proper nounThe epoch of reionization of the Universe, where matter decoupled from energy, and space became transparent to radiation. One of the Ages of the Universe. The cosmic era when ultraviolet radiation of the first (Population III) stars and quasars ionized neutral hydrogen, ending the Cosmic Dark Age(s).

Similar
Age of ReionizationEpoch of ReionizationEra of ReionizationReionization AgeReionization EpochReionization Era

Origin

reionization · noun

  1. Proto-Italic*wre-
  2. Latinre-
  3. Old Frenchre-
  4. Middle Englishre-
  5. Englishre-
  6. Proto-Indo-European*h₁ey-
  7. Proto-Indo-European*h₁éyti
  8. Proto-Hellenic*éimi
  9. Ancient Greekἰόν (ión)
  10. Englishion
  11. Englishionize
  12. Englishionization
  13. Englishreionization

From re- + ionization.

Full word history & related roots →

Reionization · proper noun

From reionization.

Full word history & related roots →
Cite this entry
APA

reionization. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/reionization

MLA

“reionization.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/reionization. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “reionization,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/reionization.

Source: reionization on Wiktionary, CC BY-SA 4.0.