Standard Lemma guide

oxonium

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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  • UK: /ɒkˈsəʊnɪ.əm/
  • UK: Recorded audio is listed in the source snapshot.
  • rhymes with -əʊniəm

1

noun

Meaning 1

Any univalent oxygen cation derived from water, the simplest of which is the hydronium ion (H3O+).

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, inorganic-chemistry, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From ox- + -onium.

Across languages

Translations

7 source translations are retained for this English entry.

  • Catalan: oxoni — univalent oxygen cation
  • Chinese Mandarin: 氧鎓離子 /氧𬭩离子 — univalent oxygen cation
  • Finnish: oksonium — univalent oxygen cation
  • German: Oxonium — univalent oxygen cation
  • Italian: ossonio — univalent oxygen cation
  • Japanese: オキソニウム (okisoniumu) — univalent oxygen cation
  • Spanish: oxonio — univalent oxygen cation