homonuclear

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adjective

Having atoms of only one element, especially having elements of only a single isotope.

Opposite
heteronuclear
OriginEnglish nuclear ← Ancient Greek ὁμός (homós) ← Proto-Hellenic *homós →
RareScrabble 18
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Meanings

adjectivehomonuclear (not comparable)
  1. not comparablechemistryHaving atoms of only one element, especially having elements of only a single isotope.
  2. not comparablechemistryTaking place within the same ring of a compound.

Synonyms & antonyms

Opposite
heteronuclear

Origin

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*somHós
  3. Proto-Hellenic*homós
  4. Ancient Greekὁμός (homós)
  5. Englishhomo-
  6. Englishnuclear
  7. Englishhomonuclear

From homo- + nuclear.

Full word history & related roots →
Cite this entry
APA

homonuclear. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/homonuclear

MLA

“homonuclear.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/homonuclear. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “homonuclear,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/homonuclear.

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