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carbon US English

The chemical element of atomic number 6, a nonmetal that has two main forms (diamond and graphite) and that also occurs in impure form in charcoal, soot, and coal

C in carbon US English

The chemical element of atomic number 6, a nonmetal that has two main forms (diamond and graphite) and that also occurs in impure form in charcoal, soot, and coal

carbon-12 US English

The most common natural carbon isotope, of mass 12. It is the basis for the accepted scale of atomic mass units

carbon-13 US English

A stable isotope of carbon, mass number 13, which makes up about 1.1 per cent of natural carbon and is used in isotopic labelling and nuclear magnetic resonance studies.

carbon-14 US English

A long-lived naturally occurring radioactive carbon isotope of mass 14, used in carbon dating and as a tracer in biochemistry

albo-carbon US English

Naphthalene as used in gas lamps, in which its vapour was mixed with the gas in order to produce a brighter flame. Chiefly attributive in albo-carbon lamp, albo-carbon light.

carbon arc US English

An electric arc struck between electrodes made of carbon, used especially as an intense source of light; frequently attributive.

carbon copy US English

A copy of written or typed material made with carbon paper

carbon-date US English

Determine the age or date of (organic matter) from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains

carbon debt US English

The imbalance between the carbon footprint of a particular country, group, person, etc., and any carbon offsetting that has been agreed or undertaken to counteract this

carbon-free US English

Containing no carbon, free of carbon.

carbon sink US English

A forest, ocean, or other natural environment viewed in terms of its ability to absorb carbon dioxide from the atmosphere

carbon star US English

A cool red giant star whose spectrum shows features due to carbon-based molecules, indicative of a preponderance of carbon relative to oxygen in the star's atmosphere.

carbon tax US English

A tax on fossil fuels, especially those used by motor vehicles, intended to reduce the emission of carbon dioxide

carbon tet US English

= carbon tetrachloride.

high-carbon US English

Designating materials, especially steel, containing a relatively high proportion of carbon; made from such a material.

low-carbon US English

Causing or resulting in only a relatively small net release of carbon dioxide into the atmosphere

zero-carbon US English

Causing or resulting in no net release of carbon dioxide into the atmosphere

black carbon US English

A black particulate form of pure carbon, typically resulting from the incomplete combustion of carbonaceous material and forming the main constituent of soot.

carbon–14 date1 US English

= carbon date.

carbon–14 date2 US English

= carbon-date.

carbon black US English

A fine carbon powder used as a pigment, made by burning hydrocarbons in insufficient air

carbon bronze US English

A kind of bronze containing a small proportion of carbon.

carbon chain US English

A number of carbon atoms bonded together in a sequence and forming part of a molecule, polymer, etc.

carbon-copied US English

Duplicated using carbon paper. Now chiefly in extended use: exactly replicated; of which there are multiple (similar or identical) examples.

carbon credit US English

A permit that allows a country or organization to produce a certain amount of carbon emissions and that can be traded if the full allowance is not used

carbon cycle US English

The series of processes by which carbon compounds are interconverted in the environment, chiefly involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels

carbon dating US English

The determination of the age or date of organic matter from the relative proportions of the carbon isotopes carbon-12 and carbon-14 that it contains. The ratio between them changes as radioactive carbon-14 decays and is not replaced by exchange with the atmosphere

carbon fiber US English

A material consisting of thin, strong crystalline filaments of carbon, used as a strengthening material, especially in resins and ceramics

carbon light US English

Light emitted by a carbon arc or by excited carbon atoms.

carbon offset US English

An action or process (typically the planting of trees) which counteracts or is claimed to counteract the emission of carbon dioxide resulting from industrial or other human activity; a quantifiable amount of such action as a tradable commodity.

carbon paper US English

Thin paper coated with carbon or another pigmented substance, used for making copies of written or typed documents

carbon pencil US English

A slender rod of carbon, especially one used as an electrode.

carbon print US English

A print made by the carbon process.

carbon steel US English

Steel in which the main alloying element is carbon, and whose properties are chiefly dependent on the percentage of carbon present

carbon tissue US English

Paper covered with a light-sensitive, pigmented, gelatin layer, used especially in transferring positive images to photogravure plates.

retort carbon US English

Carbon which remains as a residue in the retort when gas has been extracted from coal by heating.

carbon–14 dating US English

= carbon dating.

carbon dioxide US English

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis

carbon emission US English

Emission of carbon, especially into the atmosphere in the form of carbon dioxide as a contributor to global warming.

carbon fixation US English

The incorporation of carbon into organic compounds by living organisms, chiefly by photosynthesis in green plants

carbon monoxide US English

A colorless, odorless toxic flammable gas formed by incomplete combustion of carbon

carbon nanotube US English

A nanotube composed of carbon atoms.

carbon-neutral US English

Making no net release of carbon dioxide to the atmosphere, especially through offsetting emissions by planting trees

carbon printing US English

The printing of photographs by the carbon process.

carbon process US English

A method of making photographic prints that uses a pigment, especially carbon, contained in a sensitized tissue of gelatin

carbon skeleton US English

A number of carbon atoms bonded together and forming the basic framework of a molecule.

carbon suboxide US English

An oxide of carbon having fewer oxygen atoms than carbon atoms in its molecule; specifically a foul-smelling gas, C3O2, prepared by dehydrating malonic acid.

carbon trading US English

Another term for emissions trading.

activated carbon US English

Charcoal that has been heated or otherwise treated to increase its adsorptive power

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