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CO2
I. (noun)
Sense 1
Meaning:
A heavy odorless colorless gas formed during respiration and by the decomposition of organic substances; absorbed from the air by plants in photosynthesis
Synonyms:
carbon dioxide; carbonic acid gas; CO2
Classified under:
Hypernyms ("CO2" is a kind of...):
dioxide (an oxide containing two atoms of oxygen in the molecule)
greenhouse emission; greenhouse gas (a gas that contributes to the greenhouse effect by absorbing infrared radiation)
Hyponyms (each of the following is a kind of "CO2"):
blackdamp; chokedamp (the atmosphere in a mine following an explosion; high in carbon dioxide and incapable of supporting life)
Context examples:
Ending overfishing is a quick, deliverable action which will restore fish populations, create more resilient ocean ecosystems, decrease CO2 pollution and increase carbon capture, and deliver more profitable fisheries and thriving coastal communities.
(Oceans running out of oxygen at unprecedented rate, The Titi Tudorancea Bulletin)
Native fish hatchlings will find it more difficult to use sound to reach secure shelters in the oceans of the future that are acidified by carbon dioxide (CO2), threatening fish populations.
(Fish larvae lose their way to safety in acidified oceans, SciDev.Net)
Higher or lower than normal values for the serum electrolytes; usually affecting NA, K, CHL, CO2, glucose, bun.
(Electrolyte Imbalance, NCI Thesaurus)
A radioconjugate consisting of dextromethorphan, a synthetic, methylated dextrorotatory analogue of levorphanol, conjugated with carbon-13 [(13)C] with radiotracer activity. (13)C-dextromethorphan can be used in a breath-test phenotype assay of CYP2D6 activity, based on the principle that CYP2D6-mediated O-demethylation cleaves a (13)CH3 that enters the body's carbon pool to be eliminated ultimately as (13)CO2 in expired air, which can be measured.
(Carbon C-13 Dextromethorphan, NCI Thesaurus)
Deep in the waterlogged peat of salt marshes, carbon is stored at much greater rates than in land ecosystems, serving as an offset to climate change caused by carbon dioxide (CO2) build-up in the atmosphere.
(Salt marshes' capacity to store carbon may be threatened by nitrogen pollution, National Science Foundation)
Over the course of the year, CO2 levels rise during fall and winter and decline during the Northern Hemisphere’s summer as terrestrial plants consume CO2 during photosynthesis.
(South Pole is last place on Earth to pass global warming milestone, NOAA)
Forests in seasonally snow-covered areas serve as key CO2 sinks, thanks to the natural processes by which trees take in carbon.
(Earlier snowmelt decreases streamflow, reduces forests' ability to regulate atmospheric carbon dioxide, NSF)
The warming impact of gases other than CO2 is equivalent to an additional 85 ppm of carbon dioxide.
(Warming due to carbon dioxide jumped by half in 25 years, NOAA)
The Southern Ocean is particularly vulnerable to acidification due to colder waters that increase the solubility of CO2 and upwelling that brings carbon-rich water close to the surface.
(Marine organisms in Southern Ocean will face shallower zone for life, National Science Foundation)
Plants take up a large portion of the carbon dioxide (CO2) in the atmosphere — fewer trees means more CO2.
(What's killing trees during droughts?, National Science Foundation)
