Phrase guide

calcium oxide

noun · 2 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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1

noun

Meaning 1

A white powderous substance, CaO, normally made by heating calcium carbonate.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

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

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: burnt lime, quicklime

Antonyms: none provided

Broader terms: lime

2

noun

Meaning 2

a white crystalline oxide used in the production of calcium hydroxide

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: quicklime, lime, calx, calcined lime, fluxing lime, unslaked lime, burnt lime

Antonyms: none provided

Broader terms: oxide

History

Etymology

No etymology was provided for this word.

Across languages

Translations

29 source translations are retained for this English entry.

  • Bengali: ক্যালসিয়াম অক্সাইড (kêlśiẏam okśaiḍ) — white powderous substance
  • Catalan: òxid de calci — white powderous substance
  • Chinese Mandarin: 氧化鈣 /氧化钙 (yǎnghuàgài) — white powderous substance
  • Dutch: calciumoxide — white powderous substance
  • Dutch: ongebluste kalk — white powderous substance
  • Esperanto: kalko — white powderous substance
  • Esperanto: kalcioksido — white powderous substance
  • Finnish: kalsiumoksidi — white powderous substance
  • French: oxyde de calcium — white powderous substance
  • German: Calciumoxid — white powderous substance
  • German: Branntkalk — white powderous substance
  • German: Ätzkalk — white powderous substance
  • German: gebrannter Kalk — white powderous substance
  • German: ungelöschter Kalk — white powderous substance
  • German: Weißkalk — white powderous substance
  • Ancient Greek: ἄσβεστος (ásbestos) — white powderous substance
  • Hindi: चूर्णातु जारकिक (cūrṇātu jārkik) — white powderous substance
  • Hungarian: kalcium-oxid — white powderous substance
  • Ido: kalko kaustika — white powderous substance
  • Japanese: 酸化カルシウム (sanka karushiumu) — white powderous substance
  • Malayalam: നീറ്റുകക്ക (nīṟṟukakka) — white powderous substance
  • Portuguese: óxido de cálcio — white powderous substance
  • Romanian: oxid de calciu — white powderous substance
  • Russian: окси́д ка́льция (oksíd kálʹcija) — white powderous substance
  • Russian: о́кись ка́льция (ókisʹ kálʹcija) — white powderous substance
  • Spanish: óxido de calcio — white powderous substance
  • Turkish: kalsiyum oksit — white powderous substance
  • Turkish: sönmemiş kireç — white powderous substance
  • Turkish: yanmış kireç — white powderous substance