Meanings
- uncountablechemistryA white powderous substance, CaO, normally made by heating calcium carbonate.
When calcium oxide is combined with CO2, it naturally forms calcium carbonate over time due to thermodynamic equilibrium, explains the researcher.
2024 August 6, Ricardo Treviño, “Self-Healing Concrete Help Buildings Seal Themselves”, in TecScience, archived from the original on 19 Jan 2025Synonyms: burnt lime, quicklime
Synonyms & antonyms
nounA white powderous substance, CaO, normally made by heating calcium carbonate.
More synonyms by meaning
nouna white crystalline oxide used in the production of calcium hydroxide
Synonym sets from Open English WordNet, CC BY 4.0.
Translations
Ancient Greek ἄσβεστος
- ἄσβεστος (ásbestos)white powderous substance
Bengali ক্যালসিয়াম অক্সাইড
- ক্যালসিয়াম অক্সাইড (kêlśiẏam okśaiḍ)white powderous substance
Catalan òxid de calci
- òxid de calciwhite powderous substance
Chinese Mandarin 氧化鈣 /氧化钙
- 氧化鈣 /氧化钙 (yǎnghuàgài)white powderous substance
Dutch calciumoxide, ongebluste kalk
- calciumoxidewhite powderous substance
- ongebluste kalkwhite powderous substance
Esperanto kalko, kalcioksido
- kalkowhite powderous substance
- kalcioksidowhite powderous substance
Finnish kalsiumoksidi
- kalsiumoksidiwhite powderous substance
French oxyde de calcium
- oxyde de calciumwhite powderous substance
German Calciumoxid, Branntkalk
- Calciumoxidwhite powderous substance
- Branntkalkwhite powderous substance
- Ätzkalkwhite powderous substance
- gebrannter Kalkwhite powderous substance
- ungelöschter Kalkwhite powderous substance
- Weißkalkwhite powderous substance
Hindi चूर्णातु जारकिक
- चूर्णातु जारकिक (cūrṇātu jārkik)white powderous substance
Hungarian kalcium-oxid
- kalcium-oxidwhite powderous substance
Japanese 酸化カルシウム
- 酸化カルシウム (sanka karushiumu)white powderous substance
Portuguese óxido de cálcio
- óxido de cálciowhite powderous substance
Romanian oxid de calciu
- oxid de calciuwhite powderous substance
Russian окси́д ка́льция, о́кись ка́льция
- окси́д ка́льция (oksíd kálʹcija)white powderous substance
- о́кись ка́льция (ókisʹ kálʹcija)white powderous substance
Spanish óxido de calcio
- óxido de calciowhite powderous substance
Turkish kalsiyum oksit, sönmemiş kireç
- kalsiyum oksitwhite powderous substance
- sönmemiş kireçwhite powderous substance
- yanmış kireçwhite powderous substance
Cite this entry
calcium oxide. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/calcium%20oxide
“calcium oxide.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/calcium%20oxide. Accessed November 4, 2026.
WatkinsX Dictionary, s.v. “calcium oxide,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/calcium%20oxide.
Source: calcium oxide on Wiktionary, CC BY-SA 4.0.