Definition, CEFR level B1, pronunciation, examples, and quiz.
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Definition
nounAny oxide containing two oxygen atoms in each molecule.
Sentence Examples
Trees give off oxygen and absorb carbon dioxide.
It is said that global warming is directly related to carbon dioxide emissions.
Wind power doesn't release carbon dioxide into the atmosphere.
CEFR Practice Quiz
Plants absorb carbon ____ from the air during the process of photosynthesis.
CEFR Practice Quiz (Alternate)
Trees give off oxygen and absorb carbon ____.
Word Origin & History
Etymology tree
Proto-Indo-European *dwóh₁
Proto-Indo-European *dwi-
Proto-Hellenic *dwi-
Ancient Greek δῐ- (dĭ-)bor.
Latin di-bor.
English di-
Proto-Indo-European *h₂eḱ-der.?
Ancient Greek ὀξύς (oxús)
Proto-Indo-European *ǵenh₁-
Proto-Indo-European *-os
Proto-Indo-European *ǵénh₁os
Proto-Hellenic *génos
Ancient Greek γένος (génos)
French oxygène
Proto-Indo-European *h₂eḱ-
Proto-Indo-European *-éh₁ti
Proto-Indo-European *-yeti
Proto-Indo-European *-éh₁yeti
Proto-Indo-European *h₂eḱéh₁yeti
Proto-Italic *akēō
Latin aceō
Proto-Indo-European *dʰeh₁-der.
Proto-Italic *-iðos
Latin -idus
Latin acidusbor.
French acide
blend
French oxidebor.
English oxide
English dioxide
From di- + oxide.
Literary Quotations & Historical Citations
"Discoid lesions and minor subacute involvement may be controlled by freezing with carbon dioxide or a course of atabrine."
— 1954 February 15, Henry E. Michelson, “The Syndrome of Lupus Erythematosus”, in Modern Medicine, volume 22, number 4, Minneapolis, Minn.: Modern Medicine Publications, Inc., page 96:
"Kruban is a tidally-locked Venusian hothouse, its surface perpetually obscured by clouds of sulfur and carbon dioxides."
— 2010, BioWare, Mass Effect 2 (Science Fiction), Redwood City: Electronic Arts, →OCLC, PC, scene: Kruban:
"Oxygen levels on Earth skyrocketed 2.4 billion years ago, when cyanobacteria evolved photosynthesis: the ability to convert water and carbon dioxide into carbohydrates and waste oxygen using solar energy."
— 2013 September–October, Katie L. Burke, “In the News”, in American Scientist, archived from the original on 03 Sep 2013: